Target glutes with this simple isolation exercise. Squeeze your butt, hamstrings and core as you lift your hips off of the ground. Flex the foot in the air as if you're balancing a pizza on it! Hold at the top for three counts and lower at a controlled pace. The opposite foot should be strongly planted on the ground - press into your heel to lift hips upward. Repeat on the same leg until the timer signals you to switch.
