In different stages of life, according to the growth period is different then the muscle growth rate is also different, children’s muscle growth rate is faster than adults, adults faster than the elderly, so the fastest growth rate in the adolescent to adult stage. The human body can see very obvious muscle growth in 3-4 months under normal training, and in the case of effective strength training and aerobic training, the muscle growth rate is about 1kg/month, most of the strength training should be targeted training, according to the parts that need muscle growth for targeted training. Although the muscle growth rate is faster, but atrophy often occurs, so the key to muscle growth is to maintain continuous exercise, adhere to scientific and reasonable exercise every day to maintain the muscle growth trend.