1: Muscle pain after exercise is caused by lactic acid accumulation and muscle tearing. The metabolic product of anaerobic decomposition of sugar is lactic acid, and the feeling of muscle soreness is caused by a large accumulation of lactic acid.

2. Lactic acid produced by anaerobic metabolism of muscle can not be reversed into sugar in muscle, only a small part is oxidized, and most of it is transported to the liver by blood and converted into glycogen.

Data expansion: during exercise, due to improper warm-up activities, the physiological function of a muscle has not yet reached the state needed to adapt to exercise; Insufficient training level, poor muscle elasticity and strength; Fatigue or overload will reduce muscle function and strength.

Reduced coordination; Technical action errors or inattention during exercise, excessive or rude action; Too low temperature and humidity and poor quality of venues or equipment may cause muscle strain.