Self-esteem and fitness can certainly build muscles. First of all, the muscle clarity is not obvious, which is related to the body fat rate. As long as the body fat rate is low, most people have muscle lines. The second is muscle size, which requires exercise. Moderate, moderate and regular muscle exercise can significantly increase the strength, dimension and size of muscles. Whether it's equipment exercise or self-weight exercise, arranging training plans and paying attention to diet can exercise obvious muscles. However, self-weight exercise has some limitations compared with equipment. Equipment fitness can increase the amount of exercise according to the body's tolerance, while self-weight exercise is just constantly adapting to one's own weight and increasing the difficulty of exercise.