Still, it remains to be seen whether Stevens has unusual willpower or whether his idea can be translated to the masses. "Not everyone has the resolve he came to," said Laura Concannon, medical director of the bariatrics program at Illinois Masonic Medical Center, who recommends Stevens' book to overweight patients. "I think he just hit bottom, and not everyone in my practice has hit bottom. If they have, they'll do well with the approach. But they have to be ready and committed to make the change."
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.