Systems and methods for analyzing lower body movement to recommend footwear

This invention describes a system that uses markers placed on a person's leg, specifically below the knee, near the Achilles tendon, at the heel, and on the thigh, to track how their lower body moves. It records movements like knee motion and tibia rotation when the person is not bearing weight and again when they are. By comparing these movements, the system identifies how the body changes under load and then suggests shoe features to correct any undesirable changes.