Courtney Dauwalter used to teach biology. Now her ultrarunning achievements are challenging centuries-old ideas about the differences in physical capabilities between men and women.

If you’re thinking about having a baby, proactively preparing your body through exercise can make a big difference.

Going for a long run or ride might give your body the gift of youth, new research suggests.

What is the appeal of extreme endurance sport and why do people do it?

With expert insight from sports psychologists, we look at the physical and psychological effects of why people push themselves to the limits of human capability.

Video by Sam Padget
Commissioning Editor: Griesham Taan

With thanks to St Mary's University London, Kings Swimmers & Borja Mucientes

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After completing 50 triathlons in 50 days across all 50 US states, James Lawrence knew he could do more.

Long-distance runners, cyclists and triathletes can teach us about how to move through extended periods of discomfort.

Ultramarathoners and other endurance runners take note: You can't rely on electrolyte sports drinks and supplements to keep essential salt levels in balance and prevent illness during and after these grueling races, according to a new study.

When we work out rigorously on a regular basis, our bodies adjust to limit our ability to expend energy, a new study shows.

What do pregnancy, the Tour de France and polar trekking have in common? They all push participants toward the same limit of human endurance, according to a new study.

Scientists studied elite events, including a 3,000 mile run and the Tour de France.

Running a distance race – like a 246km ultramarathon – takes extraordinary physical fitness. But however hard they have trained, an athlete’s success hinges on their mental endurance.