Playing basketball, if I run nonstop for a while, my stomach gets upset like I'm going to puke. Is it a stamina problem, or am I going too hard for too long?
I guess its a stamina problem. I do track and this feeling is not uncommon when running fast paced long distant races - such as the 800. Mostly it just takes time to work through and develop a tolerance to. Also it will go away if you work hard enough .
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