This two-week program mandates the use of heavy compound exercises to start every weight workout. By keeping heavy training in your program, you’ll force your body to keep its natural production of growth hormone (GH). High GH, which peaks while you sleep, is a key player in the fat-burning process. Then, by targeting individual body parts with Tabata-style work, you’ll increase local blood flow to working muscles. On each Tabata exercise, start with a weight you can handle for 12–15 reps. As the work drags on, your rep counts will fade. Pause only when needed, and perform partial reps if necessary to keep going the entire 20 seconds.
In a way, moderate-intensity physical activity is that "magic pill" a lot of people are looking for, because the health benefits go beyond keeping your waistline trim: Not only can it reduce your risk of cancer, stroke, diabetes and heart attacks, but studies have shown that physical activity can significantly improve the moods of patients with major depressive disorders.