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runner's high

a state of euphoria experienced during prolonged running or other forms of aerobic, sustained exercise, attributed to an increase of endorphins in the blood. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for runner's high
  • So researchers started to look for other candidates to help explain runner's high.
  • The molecule is also chemically similar to amphetamine, a hint that it might be one source of runner's high.

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