2. Pay attention to replenish water before and after exercise: When carrying out weight-bearing training and fitness, the metabolism of water and salt in the body is vigorous and a lot of water is lost. Reasonable and timely water supplement is not only helpful to maintain blood volume, but also beneficial to blood circulation and heat dissipation of the body. Then, if the water in the body is not replenished in time, it will cause blood concentration, accelerated pulse, elevated body temperature, decreased exercise ability and fatigue.

3. Before exercise: replenish water reasonably, but don't overdo it. Too much water will upset the stomach and affect appetite and digestion and absorption. Excessive water will also affect the burden of the heart, kidneys and excretory organs, making the blood more diluted.

4. During exercise: It is not advisable to drink plenty of water during exercise and after training. During and after exercise, you must replenish water several times, so that your body can gradually get water and keep water balance. Supplementation once every 15 minutes, about 250CC each time, the hourly temperature should not exceed 1000CC, and the water temperature should be between 8- 12 degrees, which is helpful to reduce the body temperature generated during exercise and prevent overheating.