Start with your legs opened wide to the sides and your toes turned slightly outward. Placing your hands behind your head, bend your knees until your thighs are parallel to the floor. Your knees should stay over your ankles and your shoulders directly over your hips and your back.
Straighten knees to return to standing to complete one rep.
Make it harder: stay at your lowest point of your squat and pulse your hips up and down in a one-inch range of motion for 15 reps.
Make it easier: place your hands on your hips and decrease the range of motion.