Lz doesn't think acid is a good thing. It is normal for you to feel sore, because you haven't exercised for a long time. If you haven't exercised for a long time, I suggest you relax your muscles after exercise so that you won't feel sore. For example, you can pat your thighs and calves after running, so that you won't feel sore when you get up early tomorrow morning. If you exercise for a long time, you will definitely not feel pain. This is also a normal phenomenon and a good phenomenon. Lz, keep going!