Athletes who seek optimal performance by taking part in competitions learn valuable information from tests that measure your ...

Your VO2 max is an important metric for your running strength and overall health. But focusing too much on it can derail your ...

From looksmaxxing and sleepmaxxing to frictionmaxxing: 2026 has been a year of optimising specific aspects of life. The latest to emerge is VO2maxxing, which relates to how much oxygen your body ...

If it seems like everyone in your run club is talking about VO2 max these days, we wouldn’t be surprised. This metric—which is essentially a measure of your cardio fitness—is a zeitgeisty topic, ...

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 ...

If you gather a group of runners together, you’ll often hear the same kinds of chatter. Sure, race PRs and training niggles will probably predominate, but there’s another topic that’s been ...

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 ...

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

Setting a new personal max is a great way to chart your progress toward your fitness goals—so what’s the easiest way to do that? One useful step is to improve VO2 max, which is a measure of how much ...

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 ...

Besides VO2 max, experts explain which are the most important fitness metrics for triathletes plus how and when to work on ...