Exercise on high-pollution days
Staying active still matters. Move workouts indoors to a filtered room when the air is bad, and keep the pace easy outdoors.
Regular physical activity is one of the best things for heart and lung health, so the aim is to keep moving while breathing cleaner air, not to stop exercising.
Why exercise changes your exposure
During hard exercise you breathe several times more air per minute, and more through the mouth, which bypasses the nose’s filtering. On a very polluted day, a hard outdoor run delivers much more PM2.5 to the lungs than the same time spent walking.
A simple rule of thumb
| Outdoor air | Suggested approach |
|---|---|
| Good / Satisfactory | Exercise outdoors as usual. |
| Moderate | Fine for most people. Sensitive people may prefer lighter efforts or quieter routes. |
| Poor | Move hard workouts indoors. Keep outdoor activity light and short, away from traffic. |
| Very Poor / Severe | Exercise indoors, in a filtered room. Postpone outdoor sport and group runs. |
The categories are India’s National AQI. Check the reading near where you’ll be, not a city average. India’s health ministry also advises against outdoor walks and exercise in the early morning and late evening during the pollution season, when levels are usually highest.
Indoor options
- A brisk walk around the house or apartment corridors, stairs, skipping, dancing, yoga, bodyweight circuits.
- Run the purifier in the room you exercise in. You’ll be moving a lot of air through your lungs, so this is where it counts.
- Gyms vary a lot: a crowded, poorly ventilated gym with doors open to the road may not be cleaner. A monitor reading helps.
For older adults
Short sessions of indoor movement several times a day (walking, chair exercises, gentle stretching) help maintain strength and balance through a long winter indoors. Plan this deliberately: weeks of inactivity cause their own harm.
Stop and rest if…
Unusual breathlessness, chest tightness, wheezing, palpitations or dizziness during activity are signs to stop, move to cleaner air and rest. If they don’t settle quickly, or include chest pain, call 112.