Upstairs, you're talking nonsense. Muscle fatigue is caused by your long-term exercise. It is enough to exercise one part twice a week. I suggest you take three days off from exercise 1 day or five days off from exercise 1 day. Do not exercise for a long time. Muscles grow at rest, not during exercise. If it hurts, relax after exercise, otherwise lactic acid accumulation will not hurt. I just do fitness, hehe. ,