Begin in a wide stance with your knees turned out and your toes pointed outward at 45-degree angles. Place your hands behind your head for more core work or at your chest for a modification.
Bend your knees, lowering your pelvis until your thighs are parallel to the floor and your knees are at 90 degrees. Your knees should be in line with your second toe. Your back should remain upright — do not lean forward.
Press through your heels to straighten your knees and return to standing to complete one rep.