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How to judge whether the pain after fitness is caused by bone and muscle damage or lactic acid accumulation and muscle reorganization?
1, the pain caused by lactic acid accumulation usually occurs on the second day after exercise or after sleep, while the pain caused by injury occurs immediately after injury or within 1 hour.

2. Pain, the pain caused by lactic acid accumulation is generally manifested as a regional feeling, while the pain caused by injury will be manifested as a punctate or linear feeling.

3. Stretching, the aggravation of pain caused by lactic acid accumulation is not obviously tolerable during stretching, but the pain caused by injury will increase sharply during stretching.

4. Duration: Generally, the pain caused by lactic acid accumulation will be relieved or disappeared within 48-72 hours, while the pain caused by trauma will last for 4 days or more if it is not handled properly.