January 24, 2008

You’ve just dropped $300-$500 US on brand spanking new orthotics, popped them into your $120 running shoes and ouch! It feels like you’re running with two planks strapped to your feet. Toe off—are you kidding? Tempo runs? No chance! And now you’re sore in areas that you never had problems in to begin with. Did you just waste big dollars on orthotics that are no good? Thankfully, the answer is usually “no,” but it is a bit complicated. To understand why this happens, we need to examine the function of orthotics and running shoes.

Orthotics, especially those prescribed for runners, are designed to correct biomechanical faults in the foot, provide shock absorbing capability and enhance proprioception—neurological feedback from the foot to the brain that allows for better coordination and control of movement. Running shoes are also designed for...