Moreover, it is not suitable for drinking during exercise, nor can it be swallowed, nor can it be frozen.
First of all, exercise sweats, and sweat contains salt. All water in the human body is salt water.
You can't supplement salt by drinking boiled water.
Secondly, the water of glucose has little meaning. The human body has enough liver glycogen and muscle glycogen, which is enough to meet the energy consumption of exercise. Going back to eat can also restore physical strength. Moreover, when the human body decomposes a large amount of sugar to improve the blood sugar concentration, supplementing a large amount of sugar will make the blood sugar concentration too high and increase the burden on the heart and kidneys. So drinks with high sugar content are not recommended.
Drinking a lot of water will increase the total amount of body fluids, that is, the heart pumps more blood, which is a big burden and not good.
If you drink it during exercise, people's doubts will rise, and people will get fever during digestion and absorption. Drinking water at this time can easily lead to overheating and heatstroke.
Drinking frozen drinks will suddenly cool the stomach with the increase of temperature, which is not good for the stomach.