Everyday I go to the restroom, it’s part of everyone’s daily life. I start in a standing position in front of the toilet; I squat down to place myself on to the toilet. This squat position going down involves the hips and knees going into flexion and the ankles in dorsiflexion. In osteokinematics, flexion of the knee occurs within the sagittal plane and frontal axis having a fixed distal segment which is a closed kinematic chain. The arthrokinematics movement in the knee involves the convex femur gliding posteriorly on the concave tibia. The primary movers when going down involve the quadriceps (rectus femoris, vastus intermedius, vastus lateralis, vastus medialis muscles.) The action of performing a squat is considered an eccentric contraction, because it is decelerating against the force of gravity.
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