Muscle soreness is normal, because lactic acid produced by muscle metabolism cannot be discharged in time, and massage can relieve it. Rest will make the pain last for 3-4 days. But if you persist the next day, the pain will only get worse when you persist in exercise (everyone is the same), but after a short rest, especially after another day, you will find that the pain will be significantly reduced, because exercise will accelerate the metabolism of lactic acid, and persistence is victory.