13 Jul Ball Hamstring Curls
The back of your thighs are as important as the front!
Lie on your back, legs straight, with your heels on a Swiss ball. Keep your arms on the ground, palms facing up. Raise your hips so your body forms a straight line from shoulders to feet. Keeping your hips high, roll the ball in by bending your knees. Finish with the soles of your feet on the ball. Slowly extend your legs out to straight and repeat.