Learn more about this metric and the best training sessions to add to your schedule to boost your cardio fitness.

Apple, Garmin, Samsung, Google or Amazfit? I compared each one against a chest strap for heart rate accuracy and found a ...

Cardio fitness shows heart-lung strength, predicts longevity, and improves health at any age.

Studies on the neurons of mice suggest our own human endurance may have more to do with the brain than our physique.

Climbing up sets of stairs is a natural part of life, but it's one that can easily leave you bent over and gasping for air. Even if you regularly work out, or maintain your endurance on fitness ...

Yes, running is predominantly a cardiovascular exercise - but saying that all cardio is the key to faster running is like ...

Sports scientists have called the seemingly world-beating result into question. Was the test just a publicity stunt?

An expert- and science-back guide to building fatigue resistance, which helps you to finish a run just as strong as you ...

The so-called hydrogel is the new trend in marathon running. After marathon runners long relied primarily on carbohydrate ...

Confused by VO2 max? Our guide puts the metric into perspective.

VO2 max is an important measure of aerobic conditioning, whether you’re an Olympian or just a person hoping to stay healthy ...

Longevity fitness comes with the potential for new forms of anxiety and inadequacy, and all the products that prey on those feelings.