Donate

Exercise physiology

Competitors run in the 2013 Badwater Ultramarathon in Death Valley National Park, California. The 135-mile (217 km) race, which bills itself as the world's toughest foot race, goes from Death Valley to Mt. Whitney, California. Temperatures can reach 130 d

Ultrarunning tests the outer boundaries of human endurance, but doctors say it’s still safe

Science

First there was the Triathlon. Then the Ironman and Ultramarathon. Athletes are pushing themselves to their absolute limits, but despite some things to watch watch for, doctors think the sport is still safe.

The World

Department A/Health Note

The World

Want a shorter life? Watch more TV

Arts, Culture & Media
The World

For Athletes, Pre-workout Painkillers May Hurt

Sports
The World

Steroids and Baseball

Sports
Tell us about your experience accessing The World

We want to hear your feedback so we can keep improving our website, theworld.org. Please fill out this quick survey and let us know your thoughts (your answers will be anonymous). Thanks for your time!

We respect your time, attention and privacy

This is a news website, not a click casino. We do NOT employ deceptive behaviors, display annoying ads or use third party cookies and trackers to monetize your visit or help advertisers track you across the internet.

Simply, we ask that you would consider a donation to support the journalism we produce every weekday. Thank you.

This is The World

The World is a public radio program and podcast that crosses borders and time zones to bring home the stories that matter.

Follow The World

Subscribe to The World’s Latest Edition podcast for free using your favorite podcast player: