Outdoor air quality significantly impacts exercise performance, as pollutants like ozone and particulate matter can affect respiratory function and overall stamina. Poor air quality can lead to decreased oxygen intake and increased respiratory discomfort during physical activities, ultimately hindering performance. Individuals exercising in areas with high pollution levels may experience reduced endurance, decreased motivation, and less enjoyment in their workouts. Monitoring air quality and choosing optimal times and locations for outdoor exercise can help mitigate these effects and enhance overall performance.