blog post 1 revised

Each night before I go to bed, I attempt to do 20 squats. The start position for doing a squat is with my knee, hips, and ankles fully extended and the end position is with my knee, hips and ankles ending in a flexed position. The knee joint for doing a squat is in the sagittal plane about a frontal axis. The orthokinematics of the knee joint are flexion to extension in a closed kinematic chain.  The arthokinematics is the convex moving femur rolling anteriorly and gliding posteriorly on the concave stable tibial plateau. The tibiofemoral joint is a hinge joint. The primary mover for knee flexion is the quadriceps, which performs an eccentric contraction to lower down. When standing back up, the quadriceps act as the primary movers and concentrically contract to extend the knee.