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Ready, set, hot!: Does warm weather play a role in football concussions?

Heat and dehydration can cause a ?perfect storm? of risk factors for concussion among competitive football players. Researchers looked at the effects of extreme temperature on concussion rates during NCAA football games. A loss of just two percent of the body's water volume to dehydration -- a feat easily achieved during prolonged exercise in hot weather -- can lead to a significant reduction in the amount of cerebrospinal (CSF) fluid that a person has.
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