This works your shoulders, chest, arms, abs, and legs. Alternate push-ups for one minute, or do about 20-25 total
The Alternating Pushup. Begin in the full position with your hands on the floor under your shoulders and your legs extended behind you. Do one pushup. As soon as you come up, bring your knees to the floor and perform one bent-knee pushup. Continue alternating between a full pushup and a bent-knee pushup for one minute. The alternating pushup targets your arms, shoulders, abs, calves, legs, and butt. Keep your hands aligned under your shoulders, your hips lifted, and your abs tight throughout the exercise.