Activity Analysis

Every morning I get out of the bed and perform 10 squats to wake my body up. I perform the squats from full extension at my hip and knee. I then go into flexion at my hip and knee while dorsiflexion happens at the ankle joint. The motions happening at the knee joint, flexion and extension, are in the sagittal plane about a frontal axis. The osteokinematics of the hip for the down phase of the squat are extension to flexion in a closed kinematic chain. In terms of arthrokinematics, from extension to flexion at the knee joint, the convex femur rolls anteriorly and glides posteriorly on the tibia.  The prime movers for knee flexion is the quadriceps muscle, which performs an eccentric action.