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

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." FOR ABOUT A a year, an exercise physiologist I know kept offering to do a VO2 max test on me. For more ...

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

VO2 max has become ubiquitous in fitness circles. But what does it measure and how important is it to know yours? By Talya Minsberg Talya Minsberg took a VO2 max test while reporting this story. She ...

Essentially a measure of your cardiovascular fitness or aerobic capacity, your VO2 max is often considered a must-know metric if you’re a runner – especially if you’re looking to improve your running ...

After running for over a decade, I wanted to see how healthy my heart is. I got an active metabolic assessment at Life Time, measuring my VO2 max and heart rate. I also learned which running speeds ...

A.V. Hill was a 4:45 miler and already had a Nobel Prize for work in muscle physiology when he and Lupton began studying VO2 max. The experiments involved subjects running around Hill’s back garden in ...

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 ...

FOR ABOUT A a year, an exercise physiologist I know kept offering to do a VO2 max test on me. For more than a year, I’d been resisting it. Not because it’s not important. Plenty of trends have come ...