Alison Kreideweis sat nervously on the edge of a treadmill at Finish Line Physical Therapy in New York City, on Dec. 1. She’d volunteered to help demo a new wearable device that measures an athlete’s ...

If there is one stat that every cyclist wants to know, it’s their “VO2max.” Just what does this secret number mean? And more importantly, why is it a pretty near meaningless red herring, and what ...

During intense or prolonged exercise, muscles can feel like they’re burning the longer and harder someone pushes. This occurs because the muscles produce energy as quickly as possible by dipping into ...

Make way for another wearable. Launching sign-ups for its alpha program on stage today, here at TechCrunch Disrupt SF, is a startup called Humon — which is building a real-time lactic acid threshold ...

Muscles make Lactic acid deliberately, producing it from glucose, and they burn it to obtain energy. Everyone who has even thought about exercising has heard the warnings about lactic acid. It builds ...

At the end of a race, the finish line is in sight, and I want to get in under a certain time, and I know I have it in me - so I run my little heart out, only to vomit immediately after, which is ...

Endurance athletes love data. Competitive long-distance runners, for example, know all kinds of stats about their heart rate, pace for different race lengths, and even how much contact time their foot ...