Today I would like to look at why we need to be careful when running and maybe looking at reducing the amount or find an alternative.
Please don't get me wrong, I am not saying running is bad for you and I know people enjoy running. But I feel it is only something that should be performed if you are not carrying too much weight, have correct training and good movement patterns.
During each foot strike the body is exposed to repeated impact forces estimated to be two to three times the body weight of the runner. Applying this fact to a 150 pound runner, who has an average of 400 foot-strikes per foot per mile during a one-mile run, each foot would endure between 60 and 90 tons of force.
On top of this I know from performing posture assessments and movement analysis our movement patterns and core stability are generally far from perfect and result in the joints running out of their correct alignment, pre-disposing the joints to long & short term damage from the above forces.
Running is basically a one legged activity so a simple test would be to stand in front of a mirror, balance on one leg trying to stay as straight as possible, hop a few times and notice what happens to your aligment.