By most measures, Norwegian triathlete Kristian Blummenfelt is the standard of peak performance in athletics. He won the gold ...

VO2 max is an intimidating word for an easy-to-understand biometric: It’s how well your body uses oxygen when you push ...

VO2 max, the measure of how much oxygen the body consumes during exercise, has become a ubiquitous tool for professional ...

Technology columnist Geoffrey A. Fowler decided to test ChatGPT Health by uploading nearly ten years of his Apple Watch data ...

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Fitness Expert Spencer Shilstone says try the Rockport Walk Test: walk 1 mile fast, record time and heart rate, then use the formula to calculate.

See why a cardiologist calls ChatGPT Health "baseless" after a journalist's Apple Watch data leads to a failing grade. Is AI ...

A test by a Washington Post columnist shows ChatGPT Health can misinterpret Apple Watch data, delivering inconsistent and inaccurate health assessments that conflict with medical reality.

A reporter gave ChatGPT Health access to a decade of fitness data, and its assessment was not only incorrect but also ...

I gave the new ChatGPT Health access to 29 million steps and 6 million heartbeat measurements. It drew questionable ...

Discover which fitness metrics matter most for meaningful progress. Learn how expert assessment of posture, mobility, ...

The widely-accepted optimal cadence number is 180 spm, however research reveals that even some of the best pro runners vary from that number. Ng says that for many runners, a cadence of at least 160 ...