Personal Best - Drink a Slushie Before Hot-Weather Workouts - NYTimes.com
An exercise researcher in New Zealand determined that drinking an ice slushie before exercising extended runners' endurance by an average of 10 minutes—a tidbit that might come in handy when you're tackling that 5k this summer.
Blood is directed to the skin for cooling, which means it is diverted from working muscles. The hotter it is, and the harder the effort, the harder exercise becomes. Eventually, you slow down or stop, unable to go on.
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