Heel pain and pain on the bottom of the foot, often referred to as Plantar Fasciitis, is a common ailment (I've written about this before - click here for more info). And, it sometimes can be very difficult to get rid of. One of our readers sums up the problem quite well:
"I've been experiencing heel pain for at least 10 years on and off. I've had physical therapy, with electro wave treatment, cortisone shots which helped for about two months and then the pain returns. I have been diagnosed with plantar fasciitis being the problem but I'm grasping for straws with this pain. I use custom made orthotics and several store bought orthotics and I find that it helps a little bit. However, the pain still continues and in the morning its obvious the worst. Please, help/direct what I can do next. I desperately want my full mobility back. I think my lower back is now compensating. Please advise."
Signed,
Audrey
Audrey's story is a common one: chronic heel and foot pain seemingly unresponsive to a bombardment of treatments. Early in my career, when I chased symptoms as fast and as furiously as my clients did, I tried almost as many things to alleviate the symptoms of plantar fasciitis as there are letters in the alphabet : massage, ultrasound, iontophoresis, heel cord stretching, toe stretching, orthotics, taping, positional release, active release, myofascial release, strain-counter strain, strengthening exercises, heel cushions, heel wedges, soft shoes, hard shoes. Some of these things seemed to help some people some of the time for a while. But, what I wanted was the same thing my clients wanted: an answer, not a temporary fix.
The problem with plantar fasciitis, at its most fundamental level, is that the body, specifically the foot, is unable to withstand the forces of everyday life. Walking creates too much physical force on the foot and the result is pain. Healthy plantar fascia has substantial tensile strength. In fact, walking uses less than 50% of the plantar fascia strength so, you have plenty of reserve. But, once the tissue has been injured, the strength drops and so does the reserve. So, the questions are, "How do I change my body's ability to withstand force? How do I improve it? How do I get the strength back in my foot?"
The answer is something referred to as tissue remodeling. The tissues of the body (e.g. bone, ligament, or tendon) respond to the stress applied to them. Too much stress, too fast, for too long, and tissues get weaker. Too little stress, too slowly, for too long, and tissues get weaker. Tissues need just the right amount of stress for the right amount of time. When this happens, the tissue adapts and becomes stronger.
To find the right amount of force that your foot can tolerate, you somehow must reduce the effect of gravity. You could try walking in a pool; in chest deep water. The buoyancy of the water reduces your body weight and the force on your foot. In most cases, people with plantar fasciitis feel much better when walking in water.
But, your body needs a little more stress from week to week to get stronger. At some point, your foot will be ready to take a little more force but the buoyancy of the water doesn't change. No transformation without perturbation.
To simulate the buoyancy of water on land, but give us more precise control of the force, we use a special machine, the Newton. The Newton reduces the effect of gravity (makes you weigh less) while you walk or run on a treadmill. What we want to know is, "How much force can you place on your foot and walk without hurting?" Once we know the force your foot can tolerate, you can exercise on the Newton safely, stimulate a strengthening response in your injured tissues, and have a very good chance of recovery. From one week to the next, you'll know how much improvement has occurred. Your force level will change.
Here's how it works. Let's assume you weigh 150 lbs. and your foot hurts when you walk. But, in the Newton, we discover that if you weigh 100 lbs., you can walk completely pain free. The first few sessions, you walk on a treadmill while weighing 100 lbs. Outside the training sessions, you control the force on your foot during the day (this is where insoles, inserts, heel lifts, heel cups, a cane or a crutch have a role to play. These tools help reduce the force that is transferred into your foot. The decision about which thing to use depends on how much force your foot can tolerate. Some may need a crutch while others need only an insole). Then, we increase the weight to 110lbs. No problems. You exercise at 110 lbs. Then, 120 lbs. Then, 130 lbs. Get the idea? A gradual step-wise progression back to full body weight.
You can certainly try other things to help you manage the discomfort of plantar fasciitis but, bottom line, your foot has to somehow get stronger. The only way tissues become stronger is from the appropriate amount of exercise. Use it or lose it.
A pain in the foot does not have to be a pain in the butt.
Doug Kelsey




