A new study of a Tour Divide rider reveals how the human body adapts to ultra-endurance cycling. Discover the surprising ...

When ultra-runners lace up for races that stretch hundreds of miles and days, they're not merely testing their mental grit ...

A study of elite ultra-athletes shows that even under extreme training, energy use levels off at ~2.5 times basal metabolic ...

Research on ultramarathoners shows carbohydrate intake, energy intake, and average (not peak) blood glucose correlate with ...

At 4:50 a.m. on Saturday, 17-year-old Ray McPhee clipped into his bike at the base of Old San Marcos Road and pointed himself ...

The metabolic ceiling represents the maximum number of calories that a body can actually burn. For humans, it is believed to ...