Structure, sex, and strength and knee and hip kinematics during landing.

Context: Researchers have observed that medial knee collapse is a mechanism of knee injury. Lower extremity alignment, sex, and strength have been cited as contributing to landing mechanics.

Objective: To determine the relationship among measurements of asymmetry of unilateral hip rotation (AUHR); mobility of the foot, which we described as relative arch deformity (RAD); hip abduction-external rotation strength; sex; and medial collapse of the knee during a single-leg jump landing.