Quick question for guys. I've always had this problem, but I didn't really think much of it. But now that it's hindering my work-outs, I'm curious if anyone has a suggestion to solve the problem. The problem is, when I'm pushing myself with some sort of running, either sprints or trying to set a new personal-record on the mile, I get extremely nauseus. I start to heave; sometimes it's just the heaving, and other times I actually vomit. Does anyone have any suggestions for this problem?