Add high-intensity interval training to your routine with confidence, even if you’ve never done it before.

VO2 max is a powerful indicator of longevity. Here's an approachable method for improving your own.

Many runners strive to get faster, and boosting VO2 max is often part of that goal. One way to achieve both: The interval workout known as the Norwegian 4x4. 🏃🏻‍♀️For everything you need to know ...

But Zone 0 won’t get you there. To build VO2 max, you need to raise your heart rate with purposeful effort, whether through ...

VO2 max is a measure of the maximum amount of oxygen the body can handle during intense exercise. A doctor explains how it's ...

If it feels like your VO2 max won’t improve no matter how hard you push, it's time to look at the bigger picture. VO2 max, ...

You’ve probably seen the viral Norwegian 4x4 workout doing the rounds – pushed by running influencers and coaches alike. It’s popular for a reason. But most people still get it wrong. Not because of ...

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’ve been working on improving your VO2 max for a while but notice your smartwatch number barely moves (or just bounces ...

On TikTok, workout tips abound — some credible, some dubious. And recently, you may have been hearing about something called sprint training, which falls somewhere between 12-3-20 treadmill workouts ...

When runners talk physiology, two terms tend to dominate the conversation: VO2 max and lactate threshold. Although the two metrics are related, they are not the same – and they shape performance in ...