Correct some mistakes in the following statement, 1. Fitness is not a matter of time. The standard training time is about 1 hour, depending on the situation, but it should not exceed 1.5 hours. 2. I also think the long gym is a sacred place, because it allows you to practice all the muscle groups in your body and has enough weight to increase your load. The number of training moves is within 5- 12RM. Remember, nothing can make you grow faster except iron. If you want to exercise, I have nothing to say. Go running. Muscle training can't be carried out at the same time as other sports, so I won't explain the specific situation. If you want to grow muscles, don't do more than 12 times in one action. It is connected by wires. 3. Muscle fibers will not shrink, but will only thicken. Finally, my suggestion: make a suitable plan for yourself, and check Baidu if you don't have time. Beginners should not use heavy weights, but use small weights to find feelings, that is, they can feel the target muscles moving when doing actions. The test method is whether your muscles are congested and sore when you do the action, and there are still many things to say. I hope you can choose me as the best, hee hee-ask me if you don't understand.