High-intensity interval training is important, but coming back to your breath can be crucial to helping you train.

I’m not surprised that Garmin did well, but I am surprised by some of the watches at the bottom of the list. Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal ...

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 ...

Your VO2 max score offers invaluable insights into your health and fitness. A 2018 cohort study involving more than 120,000 participants found that the better your VO2 max, the lower your risk of ...

I have, at my disposal, at least nine different devices that can estimate my cardio fitness. They all put it in terms of a number scientists call VO2max. But the only way to find your actual VO2max is ...