The so-called large muscle group refers to the body several blocks of larger muscles, such as pectoral muscles, abdominal muscles, back muscles and deltoids of the upper limbs, as well as the muscles of the lower limbs of the thighs and buttocks of the gluteus maximus. These muscles are more obvious in the human body, exercise when the effect of muscle sculpting is also more significant, so the time of fitness are first exercise large muscle groups, and then with small muscle groups continue to train. But muscle group training should also pay attention to the way, method, large muscle groups recommended once a week exercise can, small muscle groups can be arranged twice a week. In addition, the training should not be too much pressure, to exercise within the body’s tolerance, so as not to overtraining lead to muscle strain, counterproductive.