A Practical Checklist for City Air Days

Traffic, construction, warm still afternoons: city air changes by the day and even by the hour. A little planning makes the difference between a pleasant walk and a day you would rather have spent indoors.

Start with the number

The Air Quality Index (AQI) turns a pile of measurements into a single score you can check in seconds. Look it up before you plan outdoor exercise, the same way you would check the forecast.

Adjust the plan, not your mood

• Move the workout. On higher-AQI days, go indoors, or shift to a time of day when readings tend to be lower.
• Change the route. A park path or side street usually means less exposure than a busy road.
• Close the windows. On poor air days, keep them shut and run the AC on recirculate.
• Clean the room you use most. A portable air cleaner with a HEPA filter in the bedroom or office is a simple upgrade.

Keep the basics easy

Drink water, keep your breathing easy during any activity, and give yourself permission to take a lighter day when the air is rough. Anyone with a heart or lung condition should follow their clinician’s guidance on air quality days.