Talya Minsberg

For more experienced athletes, heart rate zone training can help improve speed and endurance.
LIFE & CULTURE

What your heart rate can tell you about your fitness

Most fitness trackers offer a wealth of heart-rate data. Here’s how to make sense of it.

Someone with a higher VO2 max will be able to sustain a run or an aerobic activity at a given pace longer than those with a lower VO2 max.
HEALTH & FITNESS

This test might be the best way to track fitness and longevity

VO2 max has become ubiquitous in fitness circles. But what does it measure and how important is it to know yours?