The professional training methods and nutritional advice introduced in the book, whether in the living room, backyard, garage, hotel or office, only need to exercise four times a week for 30 minutes each time. Soon, you will find changes in your body. These 127 clearly explained movements can exercise every part of your body. Compared with weightlifting, they can exercise more muscles. Compared with aerobic exercise, they can burn more fat and are safer than the two. At the same time, self-weight training can also improve your balance and physical stability, thus further preventing injuries.