15-Minute Workout: 3 Moves, 300 Muscles

Use this quick full-body workout as your fast-acting, do-it-anywhere routine Perform this routine as a circuit, says its creator, Martin Rooney, P.T., C.S.C.S., author of Ultimate Warrior Workouts. Do 10 reps of each exercise, and complete as many circuits as you can in 15 minutes. Rest briefly when …