Place the band just above your knees.
Lie on your back with your hands at your sides, knees bent, and feet flat on floor hip-width apart.
Squeeze your glutes and abs and lift your hips a few inches off the floor.
Extend your right leg until it's straight, keeping your knees in line.
Return your right leg to starting position. Bring your hips back down to the floor.
Lift your hips up again. Then, extend your left leg until it's straight.
Return your left leg to starting position. Bring your hips back down to the floor. That's 1 rep.
Continue, alternating sides for 20 reps.
Focus on touching your heels on the floor each time, not your toes