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By Drs. Kevin M. Wong and Dr. Peter Carr, the running chiropractor in Seattle
The average person burns more than 500 calories per hour of moderate jogging. Whether you’re a brisk walker or a marathon runner, these activities exert forces that can damage your feet. Wearing the right footwear and learning proper running technique can ensure your feet keep working for you. Can you remember a time when you were particularly physically active? Think back to those days of elementary school and high school when much of your physical activity involved running in one form or another.

For some of you, this enjoyment of running followed you into adulthood. The next time you are driving in your neighborhood, look around; you may be surprised to see how many people are out running. Running has always been one of the most popular forms of exercise. It has many benefits including improved cardiovascular health, circulation and state of mind. However, it also is one of the prime activities that can cause significant damage to the human body. When patients come to my office for pain related to their love of running, they don’t want to hear me say, “Stop running.” This very well may be what they need, but they are looking to me for answers to help them stay in their sport. The physical act of running has different meanings to different people. Some of you may prefer walking with alternating spurts of running. You may like running at an easy or medium pace. You may prefer distance running. Regardless of your preference, there is an impact on your body, so take a moment to imagine these scenarios.

Picture yourself walking at a slow or comfortable pace. For the most part, during the walking cycle, one leg is swinging through the air and one leg is touching the ground. At one point, both legs touch the ground for a second or so (when the heel of one foot touches and the forefoot of the other takes off). Did you know that during regular walking, there are 5 G’s of force that hit our heel with every step we take? That is a pretty significant amount of force, and that’s just with walking. Also realize that when the force hits our heels, it doesn’t stop there. It then moves across our feet to the toes and up into the ankles, knees, hips, lower back and to the upper body. Think of it as a force wave that goes from the ground upward. Now picture yourself walking as fast as possible. You progress from walking to a lightly paced jog to a medium-paced run and then to full-bore running. Do you understand that the force coming from the ground into the heels increases as you go from walking to running? The answer likely is yes, but let’s put it into perspective. When we run, the force coming up to our heels from the ground is increased by three to four times our body weight. The harder the running, the more the force put onto our feet and our body. In other words, 5 G’s of force coming into our heels with walking can become more than 20 G’s with running. My goal for all of my patients is to keep them functioning at their highest level and allow them to perform whatever activities they choose to their fullest. Here is the framework and subsequent advice I give to all my runners. I hope it gives you some ideas that allow you to take care of your body so it takes care of you.

Start Slow, End Slow
Stretching is an important part of most workout routines, running included. Unfortunately, stretching is the first thing that gets left out if you are in a hurry or you’re trying to squeeze in your exercise for the day. You should be stretching before and after you run. Even five minutes of stretching after youwarm up your muscles and five minutes of stretching after for a cool down can prevent serious injury. I normally recommend 15-20 minutes of stretching to my patients before and after their workouts. There are many different stretches. Regardless of which ones you choose to do, make sure you stretch into comfort and not pain. If a stretch is hurting, back off or don’t do it. Pain is an indicator that something is wrong, and pushing past this point can invite injury to your door. Since we all run at different paces, try the following protocol the next time you finish stretching. After stretching, begin walking at a slow, comfortable pace. After a few minutes, increase your pace gradually to a faster walk, then to a light jog and then into your full, usual running speed. Obviously, the time it takes you to get to a full run will vary, but it is a nice way of getting your body into the groove. Once you are almost finished with your run, gradually slowing your pace to a walk is a nice way to start your cooldown.

Shoe Shopping
There are many types of running shoes available. It can be confusing trying to find the one that works best for you. Whether you’re in love with your running shoes and always buy a particular brand or you’re on a continual search for shoes and are never sure which ones to get, I always tell my patients to bring their shoes into my office so I can check them. Whichever shoe you buy, consider the following:
There should be good heel support to absorb the shock from the ground.
The middle of the shoe should have arch support for your inner and outer arches so the foot is protected during full weight bearing. This means that the shoe should not be able to bend in the middle.
The front of the shoe, or forefoot, should have a toe box that is wide enough to be comfortable for your toes so they don’t scrunch together.
The shoe should feel rigid or supportive enough that when you grab the shoe with both your hands and “wring it out” like a towel (twist the shoe in opposite directions), it does not twist very easily.
Another great idea is to go to your local athletic store, particularly one with knowledgeable staff. They often can evaluate your running style and recommend types of shoes that are good for you. I do have some “no brainers”: If you weigh over 200 pounds, I recommend the Brooks Beast, if you are a man, and the Brooks Addiction if you are female. Personally, I like Mizuno, and Adidas, provided they are not too cushiony.

Form
How a person runs is vitally important, and is something we address in my office. I often will take a patient and put them on a treadmill in our gym, and evaluate their running form. Loss of energy in running is why you are slower than the next guy/ gal. After all, we all generate approximately the same amount of horsepower. Eliminating the losses of energy, and returning them to your running will make you a faster runner.

Road Rules
The type of surface you run on impacts the forces exerted on your body. Obviously, the harder the surface, the more stress is placed on your joints. Surfaces like concrete and pavement are so rigid that when your feet hit the ground, there is a lot of shock coming into your heels. Running on dirt, grass and tracks will soften the impact, but still give you enough firmness to make running safe. People also can cause injury to themselves if they run on terrain that is too uneven or irregular, such as trails and sand. For those of you who have run on sand before, you understand how hard your feet and legs have to work. The softer the sand, the more this effect is exaggerated. When your feet and legs have to constantly adjust to the changing terrain, the muscles and joints are working much harder than you may realize. This means you can strain a muscle or cause injury if you are not careful. I am not saying to never run on sand – just run on the part that is closest to the water so that the ground is a bit firmer to support your body while running.

Arch Support
This is potentially the most important part of the shoe because there are very few styles out there that have the kind of arch support your body needs. Again, there are many types of orthotics on the market, so you have to choose. Remember, you have two arches: an inner arch, an outer arch. I always recommend custom-made, flexible (not hard plastic), two-arch supportive orthotics. That way, I know my patients are getting adequate support while allowing their feet to move normally as they are walking and running. Your doctor can evaluate whether you need orthotics and which type of athletic shoe is right for you. Running can be an excellent way to get exercise and it is my hope that you will take what you have read and see how it may help you walk or run more safely. Now lace up those running shoes and have fun!

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