Second wind
[sek-uhnd wind]
/ˈsɛkənd wɪnd/
Noun
A phenomenon where an individual experiences a sudden burst of energy and reduced fatigue during prolonged physical activity after reaching an initial point of exhaustion.
Second wind refers to a phenomenon where a runner suddenly feels re-energized after initial fatigue during a run. This occurs as the body adjusts to the physical exertion, optimizing oxygen delivery and energy production. It often happens after the first few miles of a run when the body shifts from anaerobic to aerobic metabolism. Real-world examples include marathon runners who feel revitalized mid-race. It matters to runners because understanding and anticipating a second wind can help them push through early fatigue, maintain pace, and improve overall performance.