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How to Be Lighter on Your Feet While Running
Why You Want to “Run Lighter” Running lighter can have three significant effects on your running: Make running fun Become more efficient Help reduce injury risk How do you run lighter? It just takes a few minor form tweaks that you’ll discover below. Use Sound to Know How “Light” You’re Running The sound your feet make when they hit the ground tells you a lot about your running form. If you hear thuds or slapping noises, you’re “running heavy.” These sounds can indicate that you can improve your running form. Once you address your form, those sounds will not only go away, but you will improve your running efficiency. So, as you explore the tips, below, use the sound of your feet as feedback – your built-in coach. Tips for Running Lighter on Your Feet What changes to your form can help you run lighter? Here are the top tips runners use to improve their form and run lighter on their feet: Make sure your feet land under your body (avoid overstriding) You want to land forefoot or midfoot Let your heels touch the ground Place and lift your foot off the ground as you run Use cues to help avoid plopping your feet Keep your core engaged Pick up your cadence Run barefoot, or in minimalist shoes Let’s dive into each tip. 1) Make sure your feet land “under your body” Landing with your foot too far in front of your body means you’re overstriding. It’s like putting on the brakes each time your foot touches the ground. Why do runners need to overcome this habit? Research shows that overstriding increases forces that go into your joints (rather than letting your muscles, tendons, and ligaments mitigate force). And many researchers believe it's the leading contributing factor for getting injured. When you run, aim to have your feet land under your body, and not out in front. To get a feel for this, we suggest exaggerating this by putting your feet “behind you” when you land. Of course, you won’t actually be able to do this, but if you try, it will highlight what overstriding feels like. 2) Land forefoot or midfoot The type of footstrike is important for running lighter. Ideally, you want a forefoot or midfoot strike instead of a heel strike. When combined with landing under your body, landing mid- or fore-strike means you're using your legs as springs, starting feet first. If you land on your heel, you've lost the first spring in your leg. Do NOT reach out with your foot to land on your forefoot or midfoot - in fact, it’s the exact opposite of what you should be doing. Instead, land with your foot underneath your body (tip #1). When you do this, it's almost impossible not to land on your forefoot or midfoot. 3) Let your heels touch the ground If you're not used to landing on the ball of your foot, it CAN make your calves and Achilles work harder. Some people never let their heels touch the ground (even in shoes!), but there's no inherent benefit for doing that. In fact, if you don't let your heel come down as far as it feels right, you're not fully using your Achilles -- the best spring in your body -- to give you "free energy" when it un-stretches. Once you land on the ball/midfoot, you can let your heel drop if it feels better to do that. It will feel better or worse depending on whether you’re: Going uphill or downhill On a flat surface or an uneven one Moving faster or slower 4) Place and lift your foot off the ground as you run Many runners practically slam their foot onto the ground, especially if they’re overstriding. Instead, think about “placing” your foot on the ground, like how you would place a dish on a table… gently. If you land with your foot under your body (tip #1), and you land midfoot or forefoot (tip #2) this is much easier to do. In fact, it’s almost automatic. To get your foot off the ground, most runners PUSH their toes into the ground. Not surprisingly, this is called “toe-ing off”. And when you toe off, you’re using your calf more than necessary, wasting energy. Instead, think about lifting your foot off the ground by lifting your knee, or pulling your foot off the ground (both of which, technically, happen by flexing your hip). An image I like to use is stepping on a bee – you wouldn’t PUSH your foot to get off the bee, since that would drive the stinger further into your foot. You would reflexively use your hip flexor to LIFT your foot off the ground. Both “placing” and “lifting” can keep you light on your feet. 5) Use a cue to help you “un-plop” your feet This is actually similar to “placing” your foot but with a twist. Many people “plop” their feet on the ground and leave them there for too long. Ideally, to run lighter, you want your feet on the ground for as little time as possible. The actual amount of time your feet are on the ground will change based on your running speed, but this tip will help you find the ideal time, no matter your speed. Coaches use a few different cues to teach runners how to avoid plopping. It helps to pretend that… You’re running on hot coals or eggshells Your feet are wheels, and you want them to touch where the wheel meets the ground The ground is moving below you like a treadmill, and you want to move your feet at the same speed as the treadmill Think about lifting your feet off the ground before they even contact it Whichever analogy you choose, you must find your own way of meeting the ground lighter with your foot and keeping it on the ground for as little time as possible. Remember to listen to the sound you are making as your foot hits the ground and use that sound as a coach. 6) Keep your core engaged Core engagement is important for light running. But it’s not just having strong abs. When you run, think of your body as a spring. If you collapse in your midsection, you’re weakening the spring and making it less efficient and, therefore, making it harder to run. Keeping your core engaged while running is about maintaining a gentle but consistent engagement of your abdominal muscles. Imagine lightly drawing your belly button towards your spine in a gentle, controlled manner that doesn't hinder your breathing. This should feel natural and sustainable throughout your run. 7) Pick up your cadence Your running cadence refers to the total number of steps you take per minute. Most people think there is a target cadence of 180 strides per minute. Contrary to popular belief, there’s no optimal running cadence. Some successful runners do more, some do less. That said, most runners run with a cadence that’s too slow. Moving your feet faster gives you less time to keep your feet on the ground. That’ll help you learn to place/lift, “un-plop” and avoid overstriding while you run. So, on your next run, pick up the cadence just a bit without running faster. It’ll feel odd at first because you’re doing something different. But once you get used to that new cadence, try picking it up a BIT more. You’ll find a sweet spot that keeps you lighter on your feet without feeling awkward. And, yes, if you’re inspired to run with a metronome, it could help ;-) 8) Run barefoot, or in minimalist shoes Taking off your shoes and running barefoot can improve your technique. Of course, this isn’t always possible, so wearing a minimalist shoe can help. You don’t need to switch to a barefoot shoe, or barefoot running full time, but doing some barefoot running can highlight some form flaws that you would never notice in a “normal” shoe. In short, running barefoot with good form feels good, and bad form feels bad. If you just explore the tips above while running barefoot, you may find that last little “hitch in your giddyup”. If you want to run barefoot, use these tips: Run on a smooth, hard surface. This will give you the most feedback. A sidewalk or bike path is good. Grass is not great because it’s sort of like taking the padding from a shoe and covering the world with it. Plus, the ground is rarely even, and you can’t see things you might not want to step on… or in. Start SMALL. Let your first barefoot run be 20-30 seconds. Yes, SECONDS. Then, the next day, see how you feel. If you’re sore like you just went to the gym, that’s good. Rest and repeat until you enjoy those 20-30 seconds… then add 10 seconds every time you feel ready If barefoot isn’t for you here’s how barefoot shoes can help improve running form: Barefoot shoes have a wider toe box that allows toes to splay, and move naturally, which can improve posture and balance. Plus, it feels great to not have your toes all squished. Truly barefoot-style shoes have a non-elevated heel (a “zero-drop”) which naturally encourages runners to land more on their midfoot or forefoot rather than the heel. Normal shoes with a “drop” will shift your center of gravity forward, and adjusting to that can put strain on your back, knees, ankles, and hips. Minimalist and barefoot shoes are lightweight shoes that do not have unnecessary padding. They let you use your muscles, ligaments, and tendons as natural shock absorbers and springs (better than any man-made foam!) They mimic the feeling of running completely barefoot while giving you a layer of protection. Barefoot shoes don’t “support” your arch which, like supporting any joint, makes the surrounding tissues weaker. Research shows that merely walking in a barefoot shoe builds foot strength as much as doing a foot exercise program. So barefoot shoes let you build strength in your feet and legs naturally the more you wear them. When your feet and legs are stronger, you can run longer distances without feeling fatigued. Even if you run in “normal” shoes, barefoot shoes are great for active recovery and that strength-building I just mentioned. So slip them on once you’re done with your “normies.” The content of this post does not constitute and is not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a physician or other qualified health provider with any questions or concerns you may have about your health or a medical condition.

How To Correct Slapping Sounds While Running Barefoot
Experienced barefoot runners find running barefoot light, easy, and fun. If you’re not experiencing the same thing, or if you have various issues like blisters or soreness… you’re doing something different than the people who aren’t having those problems. If you wonder, “What might they be doing differently? What could I change to make this light, easy, and fun?” then you’ll probably figure out the answer (probably without knowing exactly what you figured out!) and find yourself running in the same way. There are tips and ideas we can give you to help in that process, and that’s the point of this series. In this post, I want to talk specifically about barefoot running sandals. Barefoot running sandals, often called huaraches — the term that the Tarahumara use for the sandals they wear — can give you feedback that you don’t get from running barefoot. In other words, just having a little bit of rubber under your foot can give you additional information about your running that, when you attend to it, will improve your running… again, making it faster, easier, lighter and more fun. What’s the specific information I’m referring to? SOUND. When rubber meets the road — literally in this case — you hear something different than when skin meets the road. So, here’s something you should know: When you run in huaraches, you CAN run quietly… Sometimes even silently. That is, A SLAPPING NOISE IS NOT A FEATURE. It’s a pointer to something going on with your form that, once you address, will not only make the sound go away, but should improve your form. Sound is a cue. If you’re not running quietly, the question is: “Knowing that others run in sandals without making slapping noises, what could I do differently to get the same effect?” Slappy story #1 To help you find an answer, let me share a story I got from one Xero Shoes customer, Ron, who was hearing a slapping noise when he walked or ran. I give him my usual suggestions (which you’ll see below), and he called me back a day later. “I noticed something interesting,” Ron said, excited about his discovery. “When I ran up a hill (even a slight one), the noise went away! I’m doing something different with my feet when I go uphill.” “PERFECT!” I responded. “So, the next time you go out for a run, wonder what might be different about your gait when you’re going uphill, and see if you can get that same thing to happen on a flat.” Ron called back the next day even more excited. “I figured it out! I can run quietly now!” I asked what he discovered and, happily, it was everything I recommend to people in this situation: When he went uphill, he put his foot UNDER his body more, rather than reaching out with his foot at all Went he went uphill, he placed his foot on the ground so that it “met the ground”, rather than dropping it onto the ground When he placed his foot, he landed with more of a midfoot strike, almost flat-footed. He didn’t try to land on his foot, but to have his foot moving when it contacted the ground. His “spring” was softer — that is, he flexed his ankle, knee and hip more when he was going uphill, instead of landing with a rigid spring. Here’s the fun part: After noticing these things, Ron didn’t consciously do anything different when he got onto flat surfaces… but the sound had gone away. His body/mind figured out the solution for him. A second slappy story Now, some people need to be a bit more deliberate, and experiment with different ways of moving, but often just wondering and noticing is enough to create change. Here’s another story that highlights the same thing: Jason (definitely not his real name) came to the office to get a pair of Custom-Made Xero Shoes. He told me that he’d been running barefoot for 15-20 miles/week for the last 5 years. “Every now and then, though,” he confessed, “I get some pain in the top of my foot or in the bones near my forefoot.” “Oh,” I said, somewhat offhandedly as I made his shoes, “You overstride.” “No, I’ve been doing this for a long time. I have good form.” “I hear you,” I replied, “but I’m willing to bet you overstride, that with the idea you should land on your forefoot, you’re reaching out with your foot. In fact, I’m willing to bet that as soon as you put these sandals on, you’ll discover the same thing.” “How’s that?” he asked. “You’ll hear a slapping noise when your foot hits the ground.” Sure enough, he put on his shoes and we went for a run and with every one of his steps, you heard “Slap Slap Slap Slap.” He was shocked, but I wasn’t. It’s not uncommon that barefoot runners have some form problems that they don’t notice… just like any runner. In this case the sandals pointed out the problem. “Hey!” Jason said, looking at me as we ran together, “You’re not making any noise.” We stopped and I gave him the cues that I’m about to tell you. Within 5 minutes, his running was totally quiet. But there was another benefit. Looking almost confused, Jason said, “This feels totally different than what I’ve been doing for the last five years!” “How so?” “Easier, lighter, stronger… like I could keep going forever!” BINGO! Me, me, me, me, me I know that the stories above suggest that all slapping noises are caused by form. And, frankly, that’s true 99% of the time. The other 1% is if your sandals are tied WAY too loosely. When you tie Xero Shoes, they should be comfortable. Definitely not tight. And while it’s true that if they’re way too loose, that could increase the chance of making slapping noises, if you walk or run with really good form, even having your sandals practically falling off your feet won’t cause noise. But, if your form isn’t perfect yet, then you may want to try tightening the lace a bit (again, if they feel too tight when you do that, you’ve gone too far). So, assuming too-looseness isn’t the issue… De-slapping So, here are the recommendations for “de-slapping” your running: Simply wonder, “What could people who run quietly be doing that I’m not?” and then experiment with your gait Feet under you — Rather than overstriding, don’t reach out with your foot. Place your foot closer to “under” your body. Exaggerate this for a while if you want to, as if you could place your foot behind you when you land Be soft — think of your lower body as a spring… from the foot, through the ankle, through the knee, into the hip. Catch the ground — rather than “landing” on your foot, imagine that the ground is a treadmill, and you have to “catch” the moving ground under you with a moving foot. So your foot contacts the ground as it’s already moving Try new foot placements — some people land on the ball of their feet. Others land midfoot. Some land flat-footed. Experiment and see which feels right for you. Notice, by the way, that how you land may change depending on whether you’re going up or down hill, accelerating or decelerating. Run uphill — feeling the difference as you run uphill may, like Ron, help you discover how to run quietly Here’s my favorite tip, though: MAKE NOISE! — one way to stop making noise is to deliberately make noise so you understand where the noise comes from. You want to prove to yourself that overstriding causes slapping? Simply run fast and then try to stop quickly — to stop quickly you have to overstride. I bet you hear slapping noises. Want to prove that a “tight spring” could make noise? Pretend you have no knees for a few strides and see what happens when you land almost straight-legged. Get the idea? Let me know what you discover in the comments below.

Can Barefoot Shoes Help with Posture? What to Know
How Can Barefoot Shoes Help With Posture? Excellent posture is not just about your physical appearance - it’s a cornerstone of your long-term health. And believe it or not, the secret to achieving better posture lies beneath your feet. The footwear you choose can negatively impact your posture. The right type of shoes can help correct posture, providing comfort and better alignment for your body. Let's take a look at posture to see how the wrong footwear can cause problems, and how the right footwear could help your posture. What Does Healthy Posture Look Like? Proper posture means that your spine should be properly aligned when you stand. There are natural curves in your lower back, mid back, and neck, but excessive curvature in any of those places or flattening in any of those places can be problematic. There are two types of posture: dynamic and static. Dynamic posture is how your body aligns during movement, for instance, walking, running, or bending over to pick up something. Static posture is how your body aligns when you are not moving, like sitting, standing, kneeling, or lying down. How Bad Posture Affects the Body Many people take good posture for granted until they notice negative effects. Poor posture can have far-reaching consequences that affect our physical well-being. Here are some of the effects of bad posture to be mindful of: Misalignment of the musculoskeletal system Poor circulation Imbalances in the body Pain in the back or neck Increased number of injuries Stress on the ligaments and joints Lack of range of motion Decrease flexibility Tight muscles Weakened muscles Difficulty breathing Poor balance Decreased efficiency in daily life or athletic performance What Causes Bad Posture? Several factors contribute to poor posture. You may be doing some of these things and not even realize it. Here are some common causes of poor posture: Prolonged periods of sitting: Having a sedentary lifestyle, you spend prolonged periods sitting or hunching over a desk, which can negatively affect posture over time. Not getting enough exercise can weaken the muscles that support your posture. Carrying excess body weight can strain the musculoskeletal system. Poor ergonomics in the workplace. This can commonly include improper desk setup, sitting for long periods of time, or incorrect positioning of computer screens. Sleeping position: Sleeping in positions that do not support proper spinal alignment. Stress, anxiety, and emotional tension leads to muscle tightness and increased muscle tension. Wearing improper footwear. Shoes can affect posture, disrupting your foot's natural ability to offer a stable base for your body. At this point, you may be thinking, “what is improper footwear?”. We’ll review characteristics of shoes that can negatively affect posture, and what kind of footwear can help you have correct natural posture. The Problem With “Normal” Shoes Many “regular” shoes can actually cause posture problems.. Here’s how shoes can impact posture: Elevated heels of “normal shoes” move your center of mass forward. This alters the body's natural alignment and can put extra pressure on the balls of the feet, ankles, hip, knees, or back to adjust for that change in center of mass. Padding that “normal shoes” typically have can negatively affect your posture. When foam cushioning wears out unevenly it can misalign your feet and ankles, which creates issues for your knees, hips and back. The narrow toe box of most conventional shoes can squeeze toes together and hinder natural toe splay. This can affect the overall stability of the feet, affecting the body's balance and posture. Thick, Stiff Soles reduced sensory feedback affecting proprioception and balance. Your feet need to provide sensory information to your brain so you can move your body effectively and efficiently. When we lose touch with the ground, our body may lose its ability to make micro-adjustments that help us maintain proper dynamic posture. How does this compare to barefoot shoes? They don’t have these issues. How Barefoot Shoes Can Help With Posture Barefoot shoes are designed to help improve your posture. While regular shoes can negatively impact posture, barefoot shoes mimic the feeling of being barefoot while providing the appropriate protection for your feet. Barefoot shoes can help improve posture in a few ways: No Heel-Toe Drop: Most shoes have an elevated heel, which shifts your center of mass forward. This forces you to adjust with your ankles, knees, hips, and back. Where you will feel the stress depends on which one of these joints is least supported by your muscles, ligaments, and tendons. Barefoot (or “minimalist” ) shoes do not elevate the heel. This can keep the body in a neutral alignment and keeps the body weight centered over the feet. Thin (but protective), Flexible Soles: Barefoot shoes have a thin yet protective sole, so you can safely FEEL to ground and give your brain the feedback needed to make dynamic postural changes. Wider, Foot-Shaped Toe Box: In the same way spreading your fingers provides balance doing pushups, spreading your toes provides you with better balance while you stand, walk or run. Barefoot shoes feature a wider toe box, which gives your toes the freedom to spread out for better balance, stability, and posture. Additional Tips to Improve Posture Aside from wearing barefoot shoes, here are some other tips to improve your posture that you can begin including in your daily routine: Be Mindful: Being aware of your posture, whether sitting or standing, is essential. Take a moment to check in with your body throughout the day. Make sure your body is properly aligned. Take Regular Walking Breaks: If you have a sedentary desk job, it's important to incorporate movement throughout the day. Set reminders to get up and take short walks, stretch, or do simple exercises. Vary your movements: By doing a variety of movements, you can help strengthen the muscles that support proper posture. This promotes muscle balance, flexibility, and core stability - all of which contribute to improved posture. Maintain a Healthy Weight: Carrying excess weight can place additional stress on your muscles, joints, and ligaments, affecting your posture. Strive to maintain a healthy weight through a balanced diet and regular exercise. What people are saying about improved posture and barefoot shoes from Xero Shoes.. “I work as an ER charge nurse and I’m on my feet nonstop for 12 hour shifts. I recently purchased the prio shoes to use for work and they have been amazing. I was even told that I appear to be walking with better posture. Hopefully I can help others discover the benefits of these shoes.” “I’m on my feet for 12+ hours and I needed shoes that give my feet plenty of support and that fit my foot. The barefoot feeling is ideal for my posture and for the anatomy of my foot. This is my second pair of Xero shoes and they did not disappoint!” Making the Switch to Barefoot Shoes If you’re ready for improved posture, it’s time to slip into a pair of barefoot shoes. Switching from a “normal” shoe to a barefoot shoe may be a bit of an adjustment, given the differences between the two. The phrase “transition slowly” is a common recommendation people will tell you. And while this isn’t wrong, transitioning to barefoot shoes is less about how quickly or slowly you make the change, and more about HOW you make the transition and not the length of time it takes. FEEL What You’ve Been Missing; Natural Comfort, Posture, and Health Barefoot footwear helps you FEEL the ground you’re walking on, and comes in many different styles of shoes, sandals and boots. Not sure what type or style of shoe you want? Use this shoe finder quiz to find a few recommended shoes for you. The content of this post does not constitute and is not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a physician or other qualified health provider with any questions or concerns you may have about your health or a medical condition.

5 Easy Tips For Better Running - Global Running Day 2023
In this 5-minute guide to better running created by “Born to Run Coach” Eric Orton, he takes the concept of running for fitness and rewrites it. When you know how often to run, how fast, and how far, you can turn running from a workout into a joy. Watch Coach Eric’s guide to help you make the most out of every step and avoid common frustrations and injuries. To build a running habit that you look forward to, keep the five things Coach Eric shared at the top of your mind... Don’t compare yourself to other runners. Your running journey is your own. Make it easy. If you want to build a strong, joyful running habit, keep it fun. Turn running into a craft. Explore form and technique and pay attention to how your body moves and feels when you run. Do less more often. A ten-minute run every day will get you further than trying to run for an hour a couple times a week. Focus on your foot core. Running strength and form starts with your feet, so build that foundation. Put Yourself on the Fast Track to Better, More Joyful Running If you want to build your foundation faster, develop better running form, and get more joy from your runs, Xero Shoes can help. Xero Shoes running shoes have foot-shaped, wider toe boxes that let your toes splay and spread. That gives your feet a wider, more natural base when you’re running, which promotes balance and gives you fuller access to your “push-off” power. They also have a zero-drop, non-elevated heel. This puts your foot in its natural position when you’re running and you’ll notice how your posture improves. The thin, flexible soles let your feet move and bend naturally, give you ground feedback which helps with form and technique, and provide just the right amount of protection for your feet. Try Xero Shoes running shoes for better form and a more joyful run.

Are Cushioned Shoes Bad for Your Joints?
Big shoe companies will try to tell you that all that padding and “motion control” technology is helping to protect you from impact. A new study from Oregon State University found the opposite. You can read all about it in this New York Times article: “Super-Cushioned Running Shoes are All the Rage, But Aren’t Foolproof.” READ THE FULL ARTICLE If you hit the article-limit paywall, here are the big takeaways on why cushioned shoes are bad for your joints: Runners in “maximalist” cushioned running shoes hit the ground harder, and pronate more (roll their ankles inward), than runners in neutral shoes This tendency gets WORSE the more you run in those shoes Super-maximal shoes “tend to be more unstable” than low-to-the-ground barefoot running shoes, even on roads and track Xero Shoes Make Happier, Healthier RunnersIf there’s a common thread among the tens of thousands of Xero Shoes reviews, it’s this: Nobody started wearing Xero Shoes because of any special technology. They just wanted to move better, and feel better. And guess what: They do! Skeptic turned believer!“I love that I can feel the ground beneath me when I walk, and it has really increased my proprioception so I’m not wobbly or tripping. I usually would kick my shoes off and go barefoot as soon as I got home, but now they don’t come off until I go to bed.” - Timothy CAmazing, life-changing shoes“I bought them because I stand all day. They are perfect. Changed my life in two days! I will buy them again.” - Donna C.Amazingly comfortable“I feel safer walking the trails wearing Xero Shoes - especially navigating rocky areas. I own 5 pairs and love them.” - Linda TOMGGreat shoes. They really do make my feet feel good. Thanks! - Shane T
Can You Cure Plantar Fasciitis with Barefoot Running?
A new study by Michael Rathleff and his colleagues offer a new approach for treating plantar fasciitis: strength training. More specifically working on foot and calf strength.Click here to read about the research. I can't say I'm surprised by this. It's often the case that gaining strength cures many movement-related problems. But what's most interesting to me is that this research suggests why many barefoot runners report an elimination of plantar fasciitis. Specifically, when you look at the report about the research and read the recommendations for the type of strength training to do, you'll see that the movements are very similar to what you do when you run with a forefoot or midfoot landing. Running this way "pre-loads" your plantar fascia, positioning your foot in a strong position when it contacts the ground, rather than being in the pre-streteched and weak position that you're in when you heel strike, especially in a highly padded shoe. The content of this post does not constitute and is not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a physician or other qualified health provider with any questions or concerns you may have about your health or a medical condition.

Leg Length Difference and Barefoot Running
Can you run barefoot if your legs are different lengths?This is a question I get at least once a week. And I think the answer may be surprising.Watch this video that I made with Joshua Gordon about barefoot running technique and leg length issues (and a LOT more). Then leave a comment below with your thoughts.EnjoyThe content of this post does not constitute and is not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a physician or other qualified health provider with any questions or concerns you may have about your health or a medical condition.
The Important Barefoot Running Blister
Getting a blister from barefoot running was the best thing that could have ever happened to me.Let me back up and tell you the whole story so you can understand why.On my second barefoot run ever, I was so fascinated by the sensations, and so transfixed by experimenting to see the effects of different stride patterns, that I didn’t even notice I had run 5k. Now that may not sound like much to you ultra-marathon guys, but I’m a sprinter. I’d never run more than a mile before!About 20 minutes after the run, though, I noticed that I had a big blister on the ball of my left foot, under my 2nd toe.It wasn’t lost on me that I only had a blister on one foot. And it was particularly interesting that it was my left foot, because most of the injuries I’d been getting (the ones that inspired me to try barefoot running, with the hope it would cure me), were in my left leg.Clearly, I was doing something with my left leg that caused the blister, something I wasn’t doing with my right leg, which felt fine.A week later, I went out for another barefoot run, well before the blister had fully healed. I thought that I’d experiment some more and see if I could run in a way that didn’t hurt. And, I figured, if I couldn’t find a way to run pain-free in about ten minutes, I’d just stop and try again when the blister was gone.As a ran, I kept thinking, “How can I stop doing with my left leg what I’m already not doing with my right?” But no luck. For the first nine minutes of that run I was in pain. I couldn’t find a way to move my leg, or meet the ground, that didn’t hurt.I put my attention on my good leg, my right leg, and wondered, “How can I just do THIS, whatever that is, with my left leg?”About a minute later, something changed.At the time, I didn’t know what it was, all I knew is that I was able to run without my left foot hurting. I wasn’t doing whatever it was that caused the blister in the first place.And, simultaneously, I started running easier, faster, lighter and with less effort than I ever had. I finished the run (only about 3k this time, but still…) and felt fine.That was the last time I’ve been injured from running.What changed? I know now that I was doing 3 things:Overstriding (reaching out with my foot rather than placing it under — or closer to — my center of mass) Pulling my foot towards me (which puts strain on the hamstring) Pushing off with my foot with a slight “pawing back” motion (instead of placing my foot then lifting it off the ground) I don’t recommend getting blisters, but one of the best things about barefoot running is that you learn to listen to the feedback — sensations — you get, and use those to coach yourself to become a better runner. It’s an ongoing process of continual improvement.That blister was the best thing that ever happened to me as a runner.The content of this post does not constitute and is not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a physician or other qualified health provider with any questions or concerns you may have about your health or a medical condition.

How To Run Barefoot
"How do I start barefoot running?" "What's the best book/course/coach for learning to run barefoot?" "Can you show me what barefoot running form looks like?" I get these questions a lot. And, frankly, I don't want to answer them. In fact, I've resisted writing this post for, well, months. Here's why (in no particular order, even though I'm using numbers to delineate my reasons): Frankly, if all you did was take off your shoes, go for a run, stop when it hurts, and experiment to find ways of running that don't hurt, you would learn more than I, or anyone else, could tell you. Those of us who've observed barefoot runners and coached barefoot running are starting to notice the obvious: different runners have different form. That is, when you look at the BEST runners, they may have a few things in common, but they're not all doing the same thing. So, I don't want to say something that isn't going to be relevant for YOU. To be totally candid, I'm in an awkward political situation -- as a guy who sells "barefoot-style" footwear, and who would like to have ALL the coaches referring their clients to me, I can't single out one coach/book/technique over another (or one "under" another, either). I can tell you that if you listen to ALL of them, and then follow a bit of advice I'll give, below, you'll appreciate each coach for his/her unique contribution to you barefoot running form. Many runners aren't aware of what their bodies are actually doing, so certain recommendations won't be effective anyway. If I say to you, "don't land on your heels," and show you a video of how you're "supposed" to land on your foot, you may be 100% convinced that you're doing what I suggested, and then a video might show that you are totally heel-striking. In other words, what I say will be less important than what you learn on your own. That said, here's some thoughts about getting started with running bare footed. Realize that the best coach you have is YOU and your sensations and whatever you can learn from watching video of yourself (especially slow motion video). In fact, you MUST become your own best coach, because no external coach will be there for every situation you'll encounter as a runner. If you can't listen to yourself, make adjustments in what you're doing, and know when to STOP... no other coach will be helpful anyway. Start SLOWLY and build up. Check out my post about getting started with barefoot running. There's no rush in making the transition to barefoot running. And there's no way to predict how long it will take YOU. Remember that this is a never-ending process that you can always improve. To be slightly more specific and technical, and tell you some of what you would discover on your own with enough time and attention: Hard, smooth surfaces are the best for learning. They give you the most feedback. You want to land mid-foot or fore-foot. Do NOT reach out with your foot to do this; that's the opposite of what you want to do. You don't need to stay on the balls of your feet and put extra strain on your calves and Achilles tendons. Once you land on the ball/midfoot, you can let your heel drop if it feels better to do that, and it will feel better/worse depending on whether you're going uphill or downhill or on a flat, and depending on what speed you're running. Don't PULL your foot toward you, or PUSH it behind you... that'll cause blisters as well as put extra strain on your hamstrings (pulling) and calves (pushing). Think, instead, about PLACING your foot on the ground and LIFTING it off. And lift by using your hip flexor. That is, think about lifting your foot off the ground by lifting up your knee, not by pushing off the ground. Aim for having your feet land more "under your body" than you're probably used to. Landing with your foot out in front of you too much is "overstriding" and it's one of the habits that most of us need to work to overcome. You may need to even exaggerate this to get the feel of it -- put your feet "behind you" when you land. You won't actually be able to do this, but if you try it will highlight what overstriding feels like... and the correct place to put your feet is probably somewhere in between. Un-Plop your feet. This is hard to describe, but many of us slam our feet into the ground, or wait for the ground to hit our feet. We plop them onto the ground instead of meeting the ground lightly. There are a lot of "cues" coaches use to teach this: Pretend you're running on hot coals, or on thin ice, or trying to sneak up on a deer, or that your feet are wheels and you want them to touch where the wheel meets the ground, or that the ground is moving below you like a treadmill and you want to move your feet at the same speed as the treadmill. You will need to find your own way to feel this. Core tight... when you run, your body is a spring. If you collapse in your midsection, you're weakening the spring and making it less efficient and, therefore, making it harder to run. Pick up your cadence. Most people think 180 steps-per-minute is some magic number. It's not. Some successful runners do more, some do less. The point of moving your feet faster than you're probably used to is that it gives you less time to keep your feet on the ground... and that'll help you learn to place/lift, "un-plop" and not overstride. LISTEN... if you're running loudly, if you make a lot of noise when your feet hit the ground, you're doing one of the above incorrectly. This is true if you're barefoot, in Xero Shoes, or any other footwear. You can run quietly (not silently), and quiet running is usually a sign of good form. WONDER! When I run, I keep a question in my mind, "How can I make this lighter, easier, and more fun... and, sometimes, faster?" Then, I experiment and see what I can find. Then, most importantly: REST. Bodies get stronger when you let them rest. There are no bonus points for not taking a day off. HAVE FUN! If it's not fun, do something different. Try a different surface, a different speed, a different reason for running (compete if you haven't before, do an obstacle course if you're usually all about putting in mile after mile). I'm sure others of you have other simple pointers. Can't wait to hear them. Oh, and did I mention, barefoot running can be, should be, and IS (once you get it) FUN... don't forget that! The content of this post does not constitute and is not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a physician or other qualified health provider with any questions or concerns you may have about your health or a medical condition.

Tips to Transition to Minimalist Running
There is an overwhelming amount of information available in the world today on how to best make the switch from regular padded or “supportive” footwear to minimalist footwear. The Xero Shoes team themselves have accumulated an amazing amount of great information and other tips on making the transition, but as a couple of ultra-marathon runners who train and race (and actually spend most of our days every day) in minimalist footwear, we would like to share some of the things that helped us early on when we made the switch. Won’t be going into too much detail around the science and research side of it all, as we aren’t doctors or researchers ourselves, but lean on more of our purely experiential learnings from heavy training and recovery practices that we have. Transition Time This shouldn’t come as much of a surprise, as it’s talked about quite a bit surrounding the minimalist running topic. But we still want to reiterate it because it’s such a foundational part of transitioning to minimalist and really will be a key factor in your longevity in the practice. If you do just one thing from this entire article, do take your time during the transition, as no amount of stretching, rolling, supplements, or any other medical treatment will be able to PREVENT issues or injuries, the way building a solid foundation will. If you take the time to let the body adapt and strengthen the muscles, tendons and other tissues, you’ll save yourself a lot of setbacks down the road! Let us make one this very clear though, it’s not at all about the actual time (in days, weeks, months, etc.) it takes to transition, but more about the method of how you transition. The actual time to transition will depend on so many factors, so just focus on paying attention to your body and how it feels. When you feel like you’re ready to increase speeds or add volume then do so. Some people will adapt faster, some people are coming from different backgrounds, so just pay attention to your own journey and know that this is a long-term change and you will reap the benefits far into the future. One last tip we’ll include on this topic. If your goal is to transition to running in minimalist footwear, keep in mind that running is only a small portion of every day. Think about ways you can also spend time in minimalist footwear at work, around the house, while running errands. Between the Genesis sandals and the Hana shoes, there’s footwear for just about every style, so these are great ways to build that muscular stamina you’ll need in your lower legs. Form This is the second layer that is super important to also PREVENT injuries from popping up during this transition. Watch videos, find a coach, read articles, basically consume as much information you can about minimalist running (this is one great video on the topic here) so that way you’ll know what you need to work on, and what things aren’t worth worrying about. For example, during the early days of the minimalist movement, it was all about landing on your forefoot. As more research was done, it wasn’t so much about which part of the foot lands first, but more about where your foot lands in relation to your center of gravity (good article on this). There are also some coaches who hammer on technique drills to get your movement patterns dialed in. Whereas there are other coaches who feel that it’s pretty tough to change 20, 30 or 40 years of muscle memory, so it’s more valuable to focus on proper muscle development to work with your pre-wires movement patterns. Bottom line, there’s a lot of conflicting information out there, and there’s no one perfect answer, or method or training, or form to use. But don’t just wing it by slapping on some huarache sandals and going for a 40km (25 mile) run! Bottom of foot rolling Two of the issues we BOTH noticed came up for us while we were ramping up our mileage in minimalist footwear, was 1) a mild cramping on the bottom of the foot, and 2) a more intense pulling pain on the top of the foot. After lots of troubleshooting, it seemed like the root cause of both of these was tight calf muscles. By switching to a more mid/forefoot landing, our calves had to work harder. This cause the calves to tighten up. The calf muscles are connected to insertions on the bottom of the feet by the facia, which explained why we were feeling the tightness down below. And because the calves were tight, they were pulling on the bottom of the foot, which required the muscles that attach to the top of your foot to hang on a little tighter to keep the foot stable. It was literally like a tug-o-war match! The single most effective remedy to both of these was surprisingly enough rolling a ball under our feet (while standing). We found a lacrosse ball was the perfect size and density to give good pressure without making us scream. However, a golf ball is also a decent option that you might have around your house. There’s no textbook technique, but two quick pointers: i) Move slowly ii) do long rolls from the front to the back of your foot. Magnesium (both internally and externally) After some longer runs on the weekends or other hard training sessions, you’re bound to feel some tight muscles. When a lot of your muscles are tightening up, it’s sometimes good to take a broader approach and address and help all of your muscles. Magnesium is something that many of us are actually deficient in, and it’s one nutrient that actually aids in our muscle function of letting go and relaxing. Magnesium supplements can be taken orally to give your body (including your aching leg muscles) some calming help. You can also find different muscle rubs that are applied to the skin and allow magnesium absorption that way, so this can be done specifically on the calves or other leg muscles that might be feeling extra tight. Kinesiology tape This one we want to set a precaution for. In a similar fashion to the way we think about painkillers, and that is that they simply mask an issue and risk pushing your body to a severe point of damage. Kinesiology tape does help two relieve certain types of pain. They also don’t have any of the side effects that painkiller medication have. And it does have some great benefits for improved blood flow and other neurological functions. But the overall “masking” issue is still there. Applying kinesiology tape to a muscle or body part in order to avoid pain or help you push through it, risks causing a lot of damage to the muscle. Now that we’ve said this, we are both advocates of kinesiology tape when a situation calls for it. Best to talk with a physical therapist (and best to have them apply it too!) to see if it can benefit you. We’ve used it during races when a muscle tightens up on us and there simply isn’t enough time to sit down and roll it out or wait for magnesium to kick in. Or if we have a race coming up some leg pain pops up the day before. Sure we’ll roll it out and do what we can, but to make sure we’re good to go for that starting line, sometimes we’ll consider applying some kinesiology tape. Hopefully, one or more of these tips can help you in your transition to minimalist footwear. The journey is absolutely worth it, and your body will be much better built up for physical activity for a long time to come! –Mel & Jon The content of this post does not constitute and is not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a physician or other qualified health provider with any questions or concerns you may have about your health or a medical condition.

How to Walk Barefoot
I expect (and kind of hope) that many people reading the title of this section will think, "Uh, I don't need instruction about how to walk. I've been doing it all my life."I also expect (and definitely hope) that others will read the title and think, "Finally, the answer to my most burning question! I've been worried that I'm walking wrong."For those of you in the first group, let me ask you this: Do tribal women in Africa with water jugs balanced on their heads walk in the same way that Olympic race walkers do? And, do either of those people walk the way you do?I'd bet that the answer you found for both of those questions is No.That's because walking isn't just walking. There are ways of walking that are more or less effective, more or less efficient, more or less healthy and strong.And if you accept that premise, that could put you in the second group.Now, for those of you in the second group, I have what could seem like bad news. There is no one answer to "How do I walk."This article will not reveal the hidden secret of locomotion that only wisened Tibetan lamas from the Drepung monastery have taught to their senior disciples, or the geometrical relationships between your lower extremity joints that is optimal for effortless, pain-free walking, or the best footwear you can use for carrying a 200 pound pack on a 1,000 mile hike over broken glass.It'll actually do something better.It'll show you how to become your own best teacher and discover your own secrets for walking efficiently, enjoyably, and easily.Before we can discuss walking, lets review of the premises behind, and arguments supporting barefoot running: Landing on your heel, especially with the ankle forward of the knee and the knee almost straight, sends shock through the joints -- the ankle, the knee, the hip, and up the spine.This isn't good.Running barefoot reduces the likelihood that you'll land on your heel... because it hurts.Landing on the forefoot or midfoot, with a bent knee and the ankle not front of the knee, reduces the force going through your joints, allowing you to use the muscles, ligaments, and tendons as natural springs and shock absorbers.So, what does all this have to do with walking?Well, the whole conversation about foot-strike rarely came up prior to the barefoot running boom. Now it's practically dinner party conversation, where the barefoot gang looks down their noses in disgust at shoe-wearing heel-strikers. And the increase in the volume of the foot-strike conversation has led to another question, which probably nobody asked prior to the publication of Born To Run. This is a question I'm emailed almost daily, namely, "How should my foot strike when I walk?"It sounds like a reasonable question.If there is some optimal way for your foot to land when you run, there must be a "right" way for it to land when you walk, right?Well, there's debate among the barefoot running research community about whether a forefoot strike is better/worse than a midfoot strike, or whether foot strike is idiosyncratic and different for different runners. There's even an argument about whether heel striking is as evil as as most barefoot runners take it to be.How can this be?Simple. Because heel strike is the effect of other aspects of your biomechanics, not the cause.Think about it. The only way you can change how your foot lands on the ground is what you do with your ankle, your hip, and your knee.To not land on your heel when you run, you probably need to bend your knee more than you usually do. But that alone could cause you to trip over your toes, so you also need to bend your hip a bit more. And then you may relax your ankle a little rather than pulling your toes towards your knee.So "land on your forefoot" is really just a cue for "bend the hip and knee and relax the ankle," but if you told someone to change their hip, knee and ankle joint angles, they'd be too confused to even take a step.Well, it's similar with walking. Where your foot lands isn't the issue. How you move your foot through space is.When you walk, your foot can land in one of three ways: touching the forefoot first, followed by the heel dropping to the ground; landing basically flat-footed, probably touching the midfoot first, or; touching/rolling over the heel... which is sort of still a flat-footed landing but with the heel contacting first.Which one of these happens is a function of how fast/slow you're walking, whether you're walking up/down hill, and what kind of surface you're on.Really, there's no need to worry about foot-strike. It'll take care of itself... if you pay attention to this next thing.First, you'll want to be barefoot, or as close to barefoot as possible.Why? Because there's value in being able to articulate the foot and to letting the nerves in your feet actually feel the ground.Many podiatrists recommend barefoot walking as a cure for plantar fasciitis. Many chiropractors and orthopedic physicians recommend barefoot walking to cure lower back pain.Being barefoot can help with plantar fasciitis because, when you're out of shoes, especially on uneven surfaces, you'll use your feet in a way that "pre-loads" the plantar fascia, putting them in a strong position when you need them.Being barefoot can help with lower back pain because... well let's take a look at that one more closely.Imagine standing on one leg.If I asked you to start walking, most people would basically swing their free leg out in front of them and, at the right moment, push off the toes of the back leg to pivot over the front foot, which has landed on the heel way out in front of you.You basically walk "behind your feet." One interesting thing about walking behind your feet is that you're never really off balance. We'll come back to that idea in a moment.Now, imagine being on one foot again. If I asked you to contract whatever muscle or muscles you can think of that would move you forward, which one(s) would you tighten. Remember I said "move you forward." Falling forward doesn't count, so the answer is not "ankle" (leaning) or "abs" (as in, bending forward until you fall).The answer is the muscles that are referred to as the "prime movers" in our body: The glutes and hamstrings.Tighten the glutes and hamstrings and you'll actually MOVE forward.And stronger glutes and hamstrings protect the lower back.But after you tighten your glutes and hamstring you will eventually get off balance and fall on your face... unless... you put your other foot down to stop you.And here's where it gets cool.If you simply place your foot down where it'll stop you from falling (rather than swinging it out in front of you like you usually do), it'll land closer to your center of mass, more flat-footed, with a slightly bent hip and knee, and with the now front leg in a biomechanically stronger position. You will have planted your foot.If you repeat this -- using your glutes and hips to move you forward, and placing your foot instead of swinging your leg forward -- you'll be supporting your lower back... and your knees, and your hips, and even your ankles.Your foot-strike will take care of itself.You'll feel like you're walking "on top of your feet" rather than behind them.And this makes you stronger, whether you're going for a stroll or carrying a 50 pound pack on a trail (which, by the way, will be easier because your engaged glutes and hamstrings support your lower back).When you think about staying on top of your feet, and using your glutes and hamstrings, you'll naturally discover the easy and efficient ways to walk in any situation. You'll understand it from the inside out, from your own experience, not from some guidebook about how many inches behind your knee you should have your ankle when you're walking up a 10 degree incline in 50 degree weather on a Thursday.Combine this with feeling the world because you're barefoot or in some truly minimalist footwear (be warned, most major shoe companies claim their product is "barefoot" when it's about as close to barefoot as a pair of stilts), and I guarantee that your next walk or hike will be a revelation... and a lot of fun.I'm still working on a video to demonstrate what I mean, but in the meantime, check out this video from Dr. Justin Lin, which makes the points I made above:The content of this post does not constitute and is not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a physician or other qualified health provider with any questions or concerns you may have about your health or a medical condition.

How NOT to Start Barefoot Running
I was on a panel discussion about barefoot running a while back. At one point, someone in the audience asked,So how do I transition to barefoot running?NOTE -- even if you're not a runner, this story is still relevant and important for you... okay, back to the story...Before I could respond, a well-respected physical therapist suggested the following:“First, switch to a slightly lower-heeled shoe than what you have. Run in that for a few months. Then switch to a racing flat, maybe one day a week for a while… then add an extra day every month, until you can run in those. Then maybe try something like Vibrams on a soft surface, like grass in a park. Work up to being able to run on the grass… then try a soft dirt path. Eventually you may be able to run on hard surfaces, but don’t do that too often. And I don’t recommend being totally barefoot because you could step on something.”The only reason I didn’t interrupt him was that I was in shock!I had never heard anything so insane in my life. Until he he tossed out his next bit of barefoot running advice:“Expect to spend about 2 to 3 years making the transition. That’s how long I’ve been doing it and I’m still not there.”That's when my shock gave way to action, and I took off the politeness gloves.“Hold on,” I said, “this is completely upside down and wrong!”Danny Abshire from Newton jumped in as well, “Right, that’s backwards.”I’ll tell you what Danny and I proposed, instead, in just a moment. But first, let’s back up to the question that started it all.“How do you transition!?”The idea built into the question itself seems to make sense. If you’re wearing a motion-controlled shoe with a 3″ heel and a $400 orthotic, it seems logical that you need to slowly wean yourself from all that support. It seems clear that you would need to get comfortable in a lower and lower heel until you’re ready for barefoot.But as we've already seen in the previous days of this course, things are not always as they seem.Here’s the bottom line: There is nothing that “prepares” you for being barefoot. Nothing.Not “zero-drop” shoes (where your heel is at the same height as the ball of your foot). Not Vibrams. Not a thinner insole. Not even Xero Shoes (more about those in a second).Anything that you put on your feet will change either your stride and biomechanics, or the amount of sensation you’re feeling in your feet (or both) compared to being barefoot. So once you take off your shoes, or fully feel the ground, you’ll need to learn to move differently.Here’s where some people stop reading what I’m saying and respond with two arguments (to points I’m not making).First, they’ll say, “Oh, so you’re some sort of barefoot purist! Who are you to tell me what to wear or not wear?”To be clear, I’m not telling anyone what to wear and I’m not saying barefoot is the only way to be. Admittedly, the majority of my time I am in Xero Shoes, but not always (more about when I'm not, and when you shouldn't be in an upcoming lesson).This article is about the myth of “transitioning”, not about your footwear, or lack thereof.Secondly, people will say, “Yes, but switching to a racing flat or zero-drop shoe will give your Achilles time to stretch and strengthen, and that better prepares you for being barefoot.”To them I say, “Not always. And for almost everyone, your Achilles has more than enough stretch. And, even if it were true that you needed to stretch your Achilles, there’s a better way than spending 2-3 years to make that happen.”Keep in mind that the biggest reason for going totally barefoot is that feeling the ground with your skin gives you the most feedback about your form. Feedback that, if you attend to it, can inspire you to change your gait to something more efficient, easy, and natural. Running in Xero Shoes is, really, the same... if they covered everywhere you stepped in 4-6mm of flexible rubber.All the other shoes I've tested reduce the amount of ground sensation you feel so that you don't get the feedback you need to adjust your gait.I’ve seen hundreds of people in VFFs or racing flats who still heel strike or have some other gait pattern where they aren’t getting much if any extra “Achilles strengthening and stretching”.So, what’s the better way to “transition” that Danny and I chimed in with? Take off your shoes (or put on your Xero Shoes), find the hardest and smoothest surface you can find (like a bike path or street) and run. But only do it for about 200 yards. See how you feel the next day. You may be sore, you may be fine. If you’re sore, wait until you’re not. Then go try again, and add 100 or 200 yards. Repeat. I think of this as the “Shampoo method” of barefoot running. Instead of “Lather, Rinse, Repeat,” it’s run a little, rest, repeat (and run a little more).Keep in mind, there are two types of soreness. One is from using muscles you haven’t used in a while, or using them in a way you haven’t used in a while (if ever), or using them a bit more than usual.The other is from doing something wrong. Like doing way too much distance (which part of 200 yards was confusing to you?), or trying to stay on your toes without letting your heels ever touch the ground (Not necessary… land mid- or forefoot, but your heel can touch down. No need to do 200 yards of calf raises).In other words, a little soreness is probably normal. A lot of soreness is telling you to try something different.And this idea that you need to be on soft surfaces. Completely wrong. And wrong for the same reason that you don’t want to be in cushy running shoes.Give yourself a soft surface and the odds are good you’ll heel-strike. Plus, soft surfaces don’t give you the feedback you want, the kind that can help you quickly learn a new and better way to run. I’ve seen barefoot runners who’ve only run on grass, and they usually look like shod runners who lost their shoes.Instead of thinking that you can work your way to barefoot or huaraches slowly, go there immediately. But work your way up in time/distance slowly.All the strengthening that you want to do before you run barefoot, you’ll get that faster by running barefoot.All the stretching you need (if, in fact, you need any), you'll get that by building up your distance, slowly.To misquote Yoda’s famous “There is no try. Only do.” There is no transition, only run (or walk, as the case may be).Oh, and in the next lesson, I'll share some of the most important tips about exactly HOW to run barefoot, including some suggestions that, frankly, I never wanted to share with anyone... shhhhh.Let me know what you think. Put in your comments, below.The content of this post does not constitute and is not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a physician or other qualified health provider with any questions or concerns you may have about your health or a medical condition.





