What should I pay attention to when drinking water in summer?

In summer, outdoor sports sweat a lot, so you must replenish water in time, but if you drink water in the wrong way, it will lead to bad consequences. Many models in beverage advertisements often pick up a bottle of beverage and drink it off during exercise or rest, which seems to quench their thirst. In fact, it is very harmful from the perspective of exercise physiology. Drinking plenty of water during and after exercise will increase the burden on the blood circulation system and digestive system, especially on the heart, causing more fatigue. The result of drinking a lot of water will only be more sweating, leading to further loss of salt, causing convulsions and cramps. Therefore, drink a small amount of water many times, only a few mouthfuls at a time, and drink more times. Don't rely on the feeling of thirst as the basis of hydration, and replenish water when you are not thirsty, so as to replenish water in a balanced way. Don't drink a lot of water at a time, but don't control the replenishment of water. If water loss is not replenished, it will seriously lead to renal failure. ?