Reason for judgment:
Excessive amount of exercise
After a large amount of activity, or a long interval without exercise, muscle soreness often occurs after starting exercise. This muscle soreness does not occur immediately after the end of exercise, but occurs 1-2 days after the end of exercise, so it is called delayed pain. The reason for delayed muscle soreness after exercise is that the muscle activity during exercise causes a slight damage of local muscle fibers and connective tissue, as well as some muscle fibers. Since the muscle fiber is slightly damaged and the tendon is local, the motor function can still be completed in the whole muscle, but there is a sore feeling. After soreness, after repairing the local minor damage in the muscle, the muscle tissue becomes stronger than before, and the same load will no longer cause soreness.
Muscle strain
Muscle strain is the damage caused by the muscle contracting or over-drawing during exercise. This is easy to occur during pull-ups and sit-up exercises. After the muscle strain, the painful part of the strained area can be touched by the muscles of the muscles, and the pain is obvious. The local swelling or subcutaneous hemorrhage is obviously restricted.
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