By most measures, Norwegian triathlete Kristian Blummenfelt is the standard of peak performance in athletics. He won the gold ...

VO2 max testing requires a mask to measure oxygen intake and carbon dioxide output to determine your cardiovascular fitness. When you think about how fit you are, you might think about how far you can ...

Your watch’s VO2 max isn’t perfect, but you can improve its accuracy with better data and heart-rate tracking.

VO2 max has long been a measure of aerobic fitness valued by endurance athletes, but it’s not a stat that should just be of interest to keen sportspeople, because a high VO2 max is also linked with ...

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

Ever wish you could breathe easier and sustain more intensity mid-workout? You may have overheard the term "VO2 max" at the gym or on a trainer’s social media page recently—but what is this fitness ...

"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 ...

If you wear a running watch, you might have noticed a function that estimates your VO2 max score. If your running is in a good place, you might have seen this number rise over the past few months or ...

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 ...

When you think about how fit you are, you might think about how far you can run or how many push-ups you can do. Or maybe you think about health metrics like your resting heart rate or heart rate ...