Noticeable changes in heart rate, like a 6 to 10 percent drift, also signal aerobic decoupling, says Norris. For example, if ...

By Dr. Sanchari Sinha Dutta, Ph.D. A year of consistent aerobic activity didn’t just boost fitness; it shifted MRI -based ...

These are places we may love to visit, but for Kílian Jornet, this is where he is most at home. Jornet, 38, is a professional ...

New VO₂ Testing Insights Suggest Popular Fitness Metrics May Be Leading to Ineffective and Counterproductive Workouts ...

In 2025, a 47-year Swedish study redefined the timeline of physical aging. Conducted by researchers at Karolinska Institutet, ...

Fitness decline starts at 35, not old age, according to a groundbreaking 47-year study. Swedish researchers tracked people ...

Choose classic for steady endurance or skate for high-energy intervals.

Researchers analysed the physiology and training behind his record-breaking run, and the results are startling ...

Slow running has been emerging as an unexpected way to run faster over long distances. Easy, conversational-pace runs can ...

Scientists have discovered how exercise protects aging muscles by suppressing DEAF1, a molecule they identified as a driver of muscle decline.

The winner might surprise you.

Preparation for a cycling marathon begins long before the start, because long distances test not only your legs, but also ...