The fitness plans presented in this volume are unique in their simplicity and effectiveness. With clear-cut fitness "targets" and tools for measuring your progress, the 5BX and XBX programs are designed to let you develop your physical fitness at your own pace, adjusting for your age, body type, and schedule. The XBX and 5BX plans are balanced to target the muscles of your entire body as well as your cardiovascular system. There's no need to mix and match with other exercises or routines. These simple 10-15 minute workouts are all you need to feel fitter and healthier than ever!