The Garmin Vivoactive 6 is still our favorite fitness tracker, but these other options from Oura, Fitbit, and Apple are also ...

A remotely supervised high-intensity interval training program boosts cardiorespiratory fitness more than usual care among ...

In my 39th year, after a steady stream of successful races, it was time to level up my training. Fresh off the hardest ...

Easy cardio and hard intervals both build fitness. Here’s how to choose the right session for your goal—and fit either one ...