My leg hurts the next day after exercise because the energy consumed per unit time during exercise is more and faster than that during rest. In order to quickly replenish the consumed energy, the body will adopt the way of rapid metabolism, glycolytic pathway. Glycolytic pathway brings a lot of energy, but it also brings lactic acid as a by-product.

After lactic acid accumulates in the human body, people will feel pain in local muscles or soft tissues. This is because a large amount of lactic acid is produced, which is difficult to be metabolized quickly in a unit time, so people will feel sore thighs the next day after exercise. After strenuous exercise, proper massage and relaxation can promote the metabolism of lactic acid and relieve the pain of thigh muscles the next day.

Extended data:

Precautions:

1, at the beginning, you should walk with steps to give your body and lower limbs enough time to adapt. Don't do it for too long at first, 10 minutes is appropriate.

2. It is very important to warm up and stretch properly before walking, especially the moderate stretching of lower limbs. Keep warm for a long time in cold weather and put on more clothes. Measure your pulse rate per minute before and after walking and record it for reference.

3. After long-term exercise, cardiopulmonary endurance will increase, heart rate will decrease, and heart rate will return to normal soon after exercise. Beginners should do it two or three times a week, and the next day is appropriate. Then you can increase the number of times appropriately until you feel the right amount. Never force it.

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