Set up: Facing away from the wall, place fitball between wall and your lower back. Lean your back into the ball, walk feet forward into a squat position. Ensure toes are visible in front of knees, feet are hip-width apart.
Set your core. Lower your body to just above knee height as arms raise to shoulder height. Push through your heels to ensure glutes are activating, rise to start position and repeat. Maintain good posture throughout, shoulders to remain down and back. If not using a fitball, lean forward slightly from the hips to maintain balance but keep back straight (neutral spine).