Muscle soreness is caused by lactic acid produced by anaerobic exercise stimulating nerve fibers in muscles, which transmit this soreness to the brain, so muscle soreness is felt. The muscles you exercise are not sore. First, it shows that your exercise intensity is too small, and there is no lactic acid during exercise, so you won't feel sore. Second, you may have a higher threshold for lactic acid stimulation, others may feel unbearable for the same exercise, and your feeling is relatively weak; Third, it may indicate that your exercise level is high and your muscles have strong resistance to lactic acid.

Generally speaking, the lower a person's exercise level, the stronger the muscle ache will be. With the improvement of exercise level, muscle strength will increase, and this feeling of pain will become weaker and weaker. At this time, it is necessary to improve the intensity of exercise, continue to stimulate the muscles to feel sore, and then weaken this sore feeling. Every time the pain decreases, it shows that the muscle strength has increased. So your muscles will get stronger and stronger.