It hurts because I haven't exercised before, and then I exercise too much at once, so it hurts only when my muscles are injured. Of course, you have to wait until the pain stops. If you don't rest, not only can you not achieve the goal of strengthening your body step by step, but it will aggravate muscle fatigue and even injury. If you exercise regularly, you will know that even if you exercise for a long time, you are just tired and won't hurt. Just have a rest. And the reason why you feel pain in your flesh is because your muscle strength is too poor to stand a little fatigue. So cater to it, let him rest, don't force it.