Sore legs on the 1st run day 2 is not recommended to continue running. Lower intensity activities such as slow walking and leg press can be performed. If you have been inactive for a long time, your legs will become sore after running, which is caused by a large accumulation of lactic acid from anaerobic muscle respiration. Therefore, it is generally not recommended to continue running on the 2nd day, which will cause further accumulation of lactic acid and lead to more serious soreness. You can promote lactic acid metabolism through appropriate exercises, such as slow walking, leg press, joint stretching, massage, etc. to accelerate the metabolism of lactic acid in the legs and relieve the symptoms of bloating. After the leg soreness is relieved, you can continue running. Before running, it is recommended to warm up sufficiently, which can effectively alleviate the phenomenon of leg soreness after running. If you can’t relieve it on your own, it is recommended to go to the hospital in time.