Exercise. Some people say three or four times a week. Some people say that they practice chest muscles on the first day, shoulders on the second day, shoulders on the third day, shoulders on the fourth day and shoulders on the fifth day. .... On the first day, I practiced three chest heads, the second day I practiced two back heads, and the third day I practiced my legs and shoulders. Practice your chest and then practice your back the next day. By the time you practice your chest for the second time, it has been 72 hours.

The so-called exercise every other day, this time is a lower limit. After strength training, each muscle should be given a rest time of more than 24 hours to prevent muscle injury. In fact, don't be greedy, practice hard. In fact, relaxation is as important as exercise. For the simplest example, when your biceps are completely tense, your triceps should be completely relaxed. If your triceps can't relax and 30% of your muscles are in tension, then your biceps are useless, and at most 70% of your muscles are in tension. So give your muscles enough time to rest.

Personally, if you want to strengthen a muscle, practice it every other day. If you want to exercise in an all-round way, take turns to practice your chest, back and shoulders.