ok...i am not super fit...but i am not way out of shape either. For the last year...at least 5 times mid match i get overwhelmed with feeling dizzy/lightheaded/nauseous....and soon vomit. What i notice is it is basically all the water i have been drinking...which isnt a very large amount...perhaps about 16 oz a set. Its like during the match...nothing i drink goes past my stomach. Now...i am an MD....so i know that my sympathetic system takes over when i play....making my bowels function at a very basal rate...but this seems a bit excessive. Anyone with any experience with this or ways to avoid it? I am considering drinking no more then 8 oz a set. Or just swish and spitting.