Why is that when you are exercising you feel like if shit, but after you finished exercising you feel really good?

[blondfrog]

I started going outside again yesterday and playing soccer with my siblings and I got tired real quick and all that lactic acid started to build which I can tolerate just not when it builds up in my throats that's the worst feeling lol, but then a few hours later I felt really good even though I was soar.

[nog6422]

During the exercise you are deprived of oxygen which makes you breathe heavily, but you still don't have enough oxygen and your lungs start getting tired which makes you out of breath. So your body releases endorphins and adrenaline so you don't get too tired. Then when you stop exercising you no longer need that much oxygen and your lungs recover, but you still have the endorphins and adrenaline left which makes you feel good.

[9mfeo]

In times of great pain and exertion, endorphins get released so that you don't die.

[blondfrog]

Does that really help prevent you from not dying though?

[9mfeo]

I think they're intended to keep you from passing out, which would make you vulnerable to attack.

[blondfrog]

Yeah I guess that makes sense hmm that's interesting.