A lot of athletes focus on workout metrics like heart rate and calories burned. But understanding and improving your VO2 max could be the key to unlocking better endurance, faster recovery, and even a ...

Hardcore endurance athletes have tracked the metric for decades, but it is increasingly touted as a measure of fitness and ...

To hit new PRs, you’ll want to keep tabs on all kinds of stats, like distance covered, pace per mile (or interval ... on ...