To stay as healthy as possible while you exercise, focus on ways to minimize your exposure to air pollution. You can limit the effects of air pollution when you exercise in many ways, including:
Timing your workouts carefully. Avoid outdoor physical activity or reduce the intensity and duration of your outdoor exercise when an air quality alert has been issued. Air pollution levels tend to be highest near midday or in the afternoon, so try to avoid outdoor exercise during these times of the day.Exercising during rush hour can expose you to higher amounts of pollution. If you can, avoid exercising near roadways where there is heavy traffic.
Avoiding high-pollution areas. Pollution levels are likely to be highest within 1/4 mile (400 meters) of a road. Urban environments and outdoor smoking areas also have higher pollution levels. If possible, avoid these kinds of areas when exercising.
Exercising indoors. Vary your routine with occasional indoor activities, especially on poor air quality days. Take a fitness class, check out a local gym or run laps on an indoor track.