Biomechanics of the foot and ankle during gait.

Running is a very popular activity, whether for competition or fitness. Breakdown injuries related to training errors, shoe wear, or change in intensity are frequently seen by the sports medicine physician. In order to understand and treat the pathologic situation, a fundamental understanding of the biomechanics of walking and running is essential. The treating physician must appreciate the distinct differences between the walking and running gait. These differences transcend a simple increase in speed of gait and include distinct changes in joint range of motion and electromyographic activity. Armed with this knowledge, the physician treating a breakdown injury can work to a solution based on scientific understanding rather than anecdotal information.