Purpose: To strengthen the muscle in the front of the thigh; To improve knee control and stability Start Position: Standing with back to wall with your heels 1-2 feet from the wall Action: Keeping back against the wall, squat down to a sitting position Parameters: Hold in sitting position for 30-60 seconds. Repeat 6-8 times. Tips: In the squat position, the lower legs should be perpendicular to the floor. For a variation, slide up and down with your back against the wall---a wall slide.