The air was electric in the French mountain town of Chamonix during the 6 p.m. sendoff of UTMB, Europe’s most famous ultra-running race. Among the approximate 2,300 runners on the start line, Logan ...

Researchers tracked ultra-runner Joe McConaughey at the 2022 Cocodona 250 ultramarathon to measure how much energy the human body can burn during extreme endurance event. When ultra-runners lace up ...

Ultra-endurance athletes can push their bodies to extraordinary extremes, but even they run into a hard biological wall. Researchers tracked ultra-runners, cyclists, and triathletes over weeks and ...

A marathon is never easy, so progressing to running your first ultra marathon (or simply, ultra) will seem pretty daunting. There may be marathon in the name, but in reality, running your first ultra ...