There are various reasons for running arm soreness, which can be categorized into lactic acid buildup and delayed muscle soreness according to when the arm soreness occurs.
1. Lactic acid accumulation: Usually, running arm soreness occurs on the day of running. Mainly due to the running speed maintained at a relatively high speed, triggering the accumulation of lactic acid, accumulation to a certain extent, the muscles will feel sore and swollen, is a kind of body protection mechanism. Generally lactic acid will be metabolized by the body after 2 hours of exercise, without any major side effects.
2. Delayed muscle soreness: the symptoms of running arm soreness generally begin to appear 12 to 24 hours after exercise, generally in 24 to 72 hours to reach the peak. Mainly as a result of minor damage to the cells involved in the exercise, and delayed muscle soreness is the stress response produced by the body in the process of repairing microscopically damaged muscles. If left untreated, it usually disappears after 7 days. Therefore, when running, it is recommended to increase the amount of exercise in a gradual manner, and the amount of running and running speed should be increased slowly and in moderation.
If the symptoms of running arm soreness are not relieved or become more serious, it is recommended to consult a doctor in time to avoid delaying the treatment.