Instructions

Lie on your back on a wooden floor (or other smooth surface). You will need to be wearing socks, have your feet on a pair of exercise sliders or with them on small towel. Set your feet about hip width apart, bending your knees and sliding your feet back close to your butt. Raise your hips, squeeze your glutes and brace your core. Extend your legs out, sliding your heels away from you until your glutes and legs are just above the floor. When they're straight, slowly contract your glutes and hamstrings fully, bending your knees and curling the sliders back to the starting position. Repeat.