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.

You may already know your VO2 max is a strong predictor of how fast you are on the bike. But if you’re fuzzy on the details, including what the term actually means, why it matters, and how you can ...

For general fitness and health, men should aim for age-adjusted VO2 max scores that put them above average. This will ensure you are maximizing reductions in all-cause mortality from having a higher ...