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

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. Plenty of fitness ...

VO2 max measures how much oxygen your body uses during hard exercise. A higher VO2 max improves endurance and longevity. Any form of aerobic exercise—such as walking, cycling, or swimming—will ...