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Ozone Can Cost You in Hard Workouts: What a New Study Found in Endurance Athletes

Marathon Handbook · 10/9/2026, 04:55:00

A new study examined ozone exposure in endurance athletes, finding that the inhaled pollutant dose rises as breathing increases during harder exercise. Because ozone is invisible, athletes may not notice its effects on their lungs during workouts. The research focuses on how higher exercise intensity raises the amount of air and potentially more pollutant moved through the lungs.

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