Challenge your balance (and your lower half) with this one-legged version.
How to do it: Stand tall on your left leg with your right foot lifted slightly off the floor, arms by your sides. Push your hips back and bend your left knee to lower your body into a squat (try to keep your right foot off the floor), reaching your arms in front of you for balance. Press through your left foot to return to standing. That's one rep. Do 15 reps on the right leg, 15 on the left.
Too tough to balance? Try tapping just the ball of your left foot on the ground during the squat until you are able to balance the entire time.
