Only doing anaerobic exercise can improve your testosterone level, and doing aerobic exercise is useless. As long as men who are naturally healthy and made of iron are better than ordinary people in that respect, because the most critical factor in muscle development is the testosterone level of androgen in the body. The higher testosterone, the more muscle mass and the stronger sexual desire. However, some people who use steroid hormone drugs are basically impotent, because exogenous hormones will cause their own hormones not to be secreted, that is, people who often use steroid hormone drugs to gain muscle are basically impotent. They will have a strong desire only after taking the medicine, but they will have no desire after taking the medicine, but they will not secrete testosterone themselves, so they must continue taking the medicine, so the biggest side effect is impotence. Only professional bodybuilders and people in fitness competitions use hormone drugs.