Many people think that muscle pain means good exercise, but it is not. Muscle pain indicates excessive or improper exercise. Symptoms of muscle soreness after exercise often do not appear immediately after exercise, but on the second or third day. This kind of muscle soreness, which usually appears 24 hours after exercise, is called "delayed muscle soreness" in sports medicine.

The pain peaked 24-72 hours after exercise and basically disappeared after 5-7 days. In addition to muscle soreness, there are often symptoms of muscle stiffness, from tenderness to muscle swelling, which hinders activities.

Delayed muscle soreness may occur in any skeletal muscle after strenuous exercise, especially after long-distance running. Long-distance runners will have pain in the extensor and flexor muscles of their hips, thighs and calves, especially at the distal end of the joint between muscles and tendons.

Most people think that excessive use of muscles will lead to muscle soreness. The reason is that the sharp increase of muscle tension and elasticity can cause physical damage to muscle structural components, increase metabolism, increase the toxicity of metabolic wastes to tissues, change the nerve regulation of muscles, and cause muscle spasm and pain.

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Muscle is mainly composed of muscle tissue. Muscle cells are slender and fibrous, so muscle cells are usually called muscle fibers. In the theory of traditional Chinese medicine, muscle refers to human muscle tissue and subcutaneous adipose tissue. Spleen governs muscles, and the nutrition of muscles comes from the transportation and transformation of spleen in Shui Gu. Muscle: name of anatomical structure.

Reference: Baidu Encyclopedia Muscle