And you didn't massage your muscles after exercise.

Lactic acid is a kind of exercise regulator in human body. During strenuous exercise, fat is broken down into calories and lactic acid (so fat people are more likely to produce lactic acid). Lactic acid can stimulate nerves and cause feelings of pain and fatigue.

Lactic acid is also a protective measure of the body, because too intense or persistent strenuous exercise will strain muscles and damage the body function, so under high-intensity exercise, the body will correspondingly inhibit people's activity ability, making people feel tired and extraordinary pain, so as to prevent too intense exercise from causing harm to the body.

Lactic acid is also a side effect of athletes' sports level, which not only makes people unable to play beyond their ability level, but also makes people tired for a long time after high-intensity exercise (especially anaerobic exercise), so professional athletes not only have extraordinary sports ability, but also have the ability to resist the pain caused by lactic acid.

Lactic acid has side effects on exercise, but it also has its good side. Lactic acid can be decomposed during exercise, and a large amount of lactic acid can stimulate the expansion of blood vessels and connective tissue (bodybuilding uses this principle). Expansion makes muscles stronger and blood circulation faster, which can make blood transport oxygen faster (so the leg muscles of professional cyclists are very soft and not as hard as stones, because such muscles have good blood circulation).

There are many ways to relieve fatigue and metabolize lactic acid:

1, massage is the best way. Professional athletes often use masseurs to massage and squeeze muscles to help them release lactic acid and cope with the next day's competition in a better state. Of course, amateur drivers don't have such good conditions, so it will help to press their muscles.

2. Taking a warm bath can effectively promote blood flow and is also one of the good ways to release lactic acid.

3, adequate sleep is conducive to the recovery of physical fatigue. If you don't get enough sleep, even if you don't exercise vigorously, your body will feel very tired. This is the reason.

4. Eating more vegetables is beneficial to lactic acid metabolism, and eating more meat is not conducive to lactic acid metabolism.

Lactic acid is produced when muscles breathe without oxygen, and it will not be decomposed and absorbed quickly. It can only be taken away by blood circulation. Because our exercise consumes a lot of oxygen, anaerobic breathing of muscles is inevitable.