A person in the fittest third of the population, ranked by how much oxygen their body can use during hard exercise, dies at a ...

Low fitness is as deadly as smoking, per a 122,000 patient study. The weekly minimum, two easy sessions and one hard, and how ...

Photo illustration: Graham Bower/Cult of Mac Apple’s VO 2 max metric measures the performance of your heart and lungs when you push yourself to the limit. Up until now, though, it’s only been useful ...

The Apple Watch is about to give you an honest review of your fitness levels. At a time when a lot of us are working from home or don’t have access to gyms, fitness trackers like the Apple Watch have ...

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. If you’ve gotten used ...

Groundbreaking new research finds that an increased cardio fitness level will reduce your risk of death from any cause by nearly 20%. Running, cycling, or swimming -- if you regularly exercise, you're ...

Our product picks are editor-tested, expert-approved. We may earn a commission through links on our site. Why Trust Us? When was the last time you went for a long jog? If your main training focus is ...

Here's the short answer: Cardio—short for cardiorespiratory training—refers to any exercise that creates such an energy demand on your system that it elevates your heart rate and gets your blood ...

"Our results suggest that the CRUNCH model needs to be modified to take into account the protective effect of physical fitness on the aging brain." The differences in both task performance and brain ...