》In a sweltering, claustrophobic chamber the size of a storage closet, a sweat-glazed man in a running top pounds away on a treadmill in the Nike Sports Research Lab in Beaverton, Ore. Wires attached to thermal sensors sprout from his body. Heat lamps beat down on him. Moist air blasts through an overhead vent. The room temperature is 95 degrees Fahrenheit. The humidity is 40%. For seven days the runner, compensated only with a Nike store credit, has come in to run for 90 minutes in these conditions, created to mimic a sweltering August afternoon in Beijing, site of this years Summer Olympics. At Nike it's all in the details: The running shirt, a prototype for the Chinese track and field teams, is being tested for its ability to wick away sweat.
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