The so-called testosterone promotion means promoting the secretion of testosterone. Testosterone is one of the essential hormones and the best hormone for muscle growth. But under normal circumstances, the secretion is not much, only when you do leg exercises or adrenaline rises will you secrete more. So generally speaking, doing more leg exercises contributes to the growth of muscles, and the human body secretes less. There is a lot of fitness now, especially bodybuilding. People like to take this medicine. Let your training effect be better, but foreigners are always inferior to themselves, and there will always be side effects, even before, and once you take drugs, you will become psychologically addicted, leading to frequent drug use, which will do great harm to yourself. Ordinary fitness, or fitness enthusiasts, can arrange training reasonably and do more leg training movements.