Gym Time: Upper Body Blast

The goal of this upper-body workout is to build lean, sexy muscle over time. You’re going to superset every exercise—or perform two exercises back to back, without rest—and hit all the major muscles on your upper half: shoulders, chest, back, biceps, and triceps! If you work hard and keep your rest periods short, this should only take you 30-45 minutes. When it gets too easy, increase the weight, decrease the rest periods, or change some of the exercises.