My Oura Ring warned me something was wrong - I didn't listen (and quickly regretted it) ...

The widely-accepted optimal cadence number is 180 spm, however research reveals that even some of the best pro runners vary from that number. Ng says that for many runners, a cadence of at least 160 ...

VO2 max, the measure of how much oxygen the body consumes during exercise, has become a ubiquitous tool for professional ...

Are sleep trackers on your phone helping you get a full night's rest? NPR's Life Kit investigates.