Stability ball wall squats ("Squat, stability ball on wall" Lower body strengthening; 01)

Stand upright and place a stability ball in the small of your back.
Rest against a wall with your feet hip width apart.
Walk your feet forwards.
Bend your knees and use the ball to slide down the wall as far as you can comfortably go.
Your hips should drop directly down towards the floor.
Push back up, driving the movement through your buttock muscles.