Blog
Health 7 min read
AQI and your lungs: what the air quality number means when you're running
When you run, you breathe ten to twenty times harder than at rest. That changes how air pollution lands in your body. Here's what runners should actually do with the AQI number.
Science 6 min read
Dew point vs humidity: why your weather app lies to runners
Relative humidity tells you almost nothing about how a run will feel. Dew point does. Here's why the distinction matters and how to use it.
Science 4 min read
Why Timing Matters More Than Temperature
Most people check the temperature before heading out. The best outdoor sessions depend on a narrow window where several conditions line up — not on one number.