Elderly people can gain muscle through exercise therapy, physical factor therapy and nutrient supplementation. 1. Exercise therapy: It is mainly carried out by way of excessive recovery exercise, that is to say, through a moderate amount of exercise, so that the muscles produce moderate fatigue, after resting, the strength and shape of the muscles can be restored or exceeded the state before exercise, and after repeated exercise, the muscles can be enlarged rapidly. 2. Physical factor therapy: mainly through low-frequency electrotherapy and medium-frequency electrotherapy, through electrical stimulation, so that the muscle produces action potential, causing muscle contraction movement, resulting in a similar effect to exercise therapy, so that the muscle enlargement. 3. Nutrient supplementation: mainly to supplement protein-based, such as chicken, fish, eggs, milk and other foods, although these foods do not have the efficacy of treating the disease, but can supplement a large amount of protein to increase the synthesis of muscle muscle fibers, so that the muscles can be enlarged. Because the physical condition of the elderly is relatively poor, in the muscle building training should be carried out under the guidance of a professional physician, if there is any discomfort, it should be timely hospital consultation, so as not to delay the condition.