The scientific name of this condition is "standing nerve dislocation", also known as "sudden syncope". This is caused by lack of oxygen in the brain! It may also be caused by iron deficiency! But most of what boys say is caused by insufficient oxygen supply to the brain! If you squat for too long, it will lead to dark circles and even invisible consequences. But it usually takes a while! This can also be said to be the reason why coke and other carbon dioxide drinks are drunk too much ~

As a former sports student,

I have some suggestions for you.

1 drink less carbonated drinks and drink more glucose water. Don't drink frozen drinks after exercise, although it feels good! But don't let this lead to chronic gastroenteritis. One teammate's brother failed the exam because of this!

Take more calcium and buy some calcium tablets. 2 1 gold or something is good, just chew if you have nothing to do!

It's right to train this thing to listen to the coach ~ at least the coach won't hurt you!

Relax more after training ~ let the muscles relax ~ otherwise it won't work. It is best to use hot water in the shower.

Rest must be sufficient, otherwise you will not achieve anything. Status determines everything ~

In fact, after practicing sports, you will know how important the state is ~