Balance ball leg curling exercise to strengthen abdominal muscles and buttocks
Lie on the floor in a supine position, stretch your arms to both sides, place your calves on the balance ball, use your calf muscles to raise your buttocks Lift off the floor until your body forms a straight line from shoulders to ankles.
Pause for 1 second, step on the ball with both feet, bend your knees and let the ball move closer to your hips. Stretch your legs and move the energy ball away. Return to starting position and repeat.