Cossack Squat

Stand with your feet wider than shoulder-width apart and point your toes slightly outward. Shift your weight to one leg, lowering your hips down and back while keeping the opposite leg straight, with your heel on the ground and toes pointing up. Keep your chest upright and your knees aligned with your toes, then return to the starting position and repeat on the other side.  Try to get as low as possible.