By Men’s Health Magazine, this mostly body-sculpting program requires no extra equipment (you’ll use your own body weight for resistance). It features gym-style supersets — three different exercises performed in a precise sequence, and then repeated. There’s nothing fancy or hard to follow; you’ll re-shape your body with familiar exercises like push-ups, squats, mountain climbers and ab crunches. The ending aero/tone segment boosts fat-burning by blending short cardio “bursts” into the muscle toning exercises. David Jack is an exceptionally friendly and clear instructor.