Water replenishment is recommended in small amounts and multiple times. In the case of mild dehydration symptoms or decreased athletic ability, it may even cause major accidents if encountering high-temperature situations.

During exercise, as the body temperature rises, if the temperature and humidity of the surrounding environment are also high, the heat cannot be dissipated well, which can cause heatstroke. Therefore, it is necessary to replenish water before and during exercise, while wearing clothes with good heat dissipation. If the temperature and humidity are too high, the movement should be interrupted in a timely manner.

During exercise, minerals such as calcium and magnesium are consumed in the body.

Supplementing calcium and magnesium at the same time can increase the burden on the gastrointestinal tract, easily eating bad stomachs, and drinking soft water is relatively better, but the same mineral content will also be less. Therefore, when using soft water to replenish water during exercise, it is necessary to consume some foods with salt and mineral components at the same time.

Hard water is more suitable for supplementing mineral components such as calcium and magnesium after exercise. Because it can easily increase the burden on the stomach and intestines, it can be consumed in small amounts several times after exercise. Drinking hard water can also reduce accidents such as foot cramps and muscle spasms during exercise.