Depending on which stage you are a bodybuilder, different rules are adopted at different stages. However, there are several general rules: heavy weight, low frequency, multiple groups, proper rest between groups, not too long, 30 seconds to 1 minute. When resting, you must relax your muscles, otherwise it will easily make them inelastic. Heavy weight is also within one's capabilities. I don't want to be fat in one bite. Generally speaking, it is more appropriate to make a weight of 8 to 12 that feels tired. Another point, the standardization of action, we must pay attention to the standard of action, not fraud.