Stand with the ball resting between the wall and your lower back.
Step your feet in front of you, shoulder width apart and your toes pointing forward.
Hold both arms directly our in front of you.
Tighten your core stability muscles before you slowly squat down.
Only bend your knees as far as you feel able to before you stop and hold this position, keeping your arms straight.
Do not allow your knees to drift inwards.
Tighten your buttock muscles before straightening your knees and returning to the start.