5-FACTOR FITNESS is based on the simple premise that less is more, especially when it comes to exercise and planning meals. There is no magic, no hidden secret. Instead, this plan taps solid scientific research as well as the author's vast experience as a personal trainer and as a consultant to military organizations on two continents. With a master's degree in exercise physiology and nutritional science as well as an honors degree in kinesiology, Pasternak is an expert on how the body works. Here he pulls together his best advice for training and fueling it efficiently.

5-FACTOR FITNESS calls for five workouts per week and each workout lasting just 25 minutes. Combining strength training and aerobics in five five-minute intervals, these short, intense workouts are designed so that people stick with the program over the long haul. No need to join a gym or buy expensive equipment; the program calls for only a workout bench and a few dumbbells.