Occupation-related squatting, kneeling, and heavy lifting and the knee joint: a magnetic resonance imaging-based study in men.

Men with frequent occupational squatting/kneeling and heavy lifting have a greater likelihood for worse cartilage morphology scores at the patellofemoral joint, adding support to the important role of biomechanical loading on the pathogenesis of knee OA, particularly patell ofemoral OA.