eli5 why do we throw up after very heavy exertion
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“What’s happening is this: As you begin to exercise, your body diverts blood from your stomach and rushes it to your muscles and skin. “During exercise, up to 80 percent of our blood flow is going to active skeletal muscles and the skin—and is being diverted from areas such as the abdomen,” says Tamara Hew-Butler, DPM, PhD, an associate professor of exercise science at Oakland University in Rochester, MI. For some people, this lack of blood flow can result in feeling nauseated.”
I have puked several times during XC races from going too hard. I know now to back off quite a bit if I feel nausea coming on.
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