It is no secret that cyclists are obsessed with numbers. Everything from power output and heart rate, to hydration, blood glucose levels, and sleep tracking. There are a million different devices that ...

Running faster with less effort probably feels like the dream. When an eight-minute mile feels like a nine-minute mile, it’s like you could set new PRs left and right. If that is your goal, there is ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Until recently, VO2 max testing has been inaccessible to most everyday athletes. Unless you had an in ...

Running to the best of your ability can feel like a numbers game. To hit new PBs, you’re probably under the impression that you should keep tabs on all kinds of ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. Whoop, the screenless ...

Jakob Roze, CSCS, is a health writer and high-end personal trainer. He is the founder and CEO of RozeFit, a high-end concierge personal training practice and online blog. VO2 max measures how much ...

If you're a fitness fiend or working to improve your health, you're probably always looking for ways to run faster and farther, train harder and push your limits. You might even already track a number ...

From age benchmarks to effective training sessions, here’s what to know ...

Are you tracking enough of your fitness metrics yet? No? Great! Here's another one: VO2 max. It's a measurement that's traditionally been used by elite athletes, especially runners and cyclists, but ...

A mix of strength, easy cardio and consistency is all it takes to build a strong aerobic base ...

I’ve done enough “real” VO2 max tests—the trips to the lab, the expensive and cumbersome equipment, the brutally exhausting treadmill protocol, and in one case, the puking in the corner ...