Veins are veins that return the surrounding blood to the heart through veins. The blood vessels are obvious, indicating that the blood inside is full, which is a good phenomenon. Blood circulation is accelerated after exercise or exercise, and venous congestion is a normal phenomenon. Moreover, there are a large number of nerve endings on the skin, which may be more sensitive after exercise and may also have a feeling of pain. Fitness people must eat more vitamins and rich foods in protein, including white meat, fish, chicken, bean products and fresh fruits and vegetables, which are more beneficial to their health.

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