Should Limit Prolonged Outdoor Exertion?

Athletic Practice and Training (2 to 4 hours) No Limitations Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion. ** Individuals with asthma or other respiratory/ cardiovascular conditions (or their caregivers) should be medically managing their condition.

How long is it safe to be outside in unhealthy air quality?

If the air quality is especially poor, it may take a few days for your body to recover. And if you're regularly exposed to high levels of unhealthy air, the health consequences can linger for months or even years. One of the most-studied pollutants in summertime air is an invisible gas called ozone.

At what level of the air quality index should all groups limit prolonged outdoor activity?

Unhealthy (151–200) The following groups should avoid prolonged or heavy outdoor exertion: • People with lung disease, such as asthma • Children and older adults • People who are active outdoors Everyone else should limit prolonged outdoor exertion.