The researchers were inspired by working with ultramarathoners, who can be sidelined by blisters despite years of training. These runners competed in the 2007 Badwater Ultramarathon in Death Valley, Calif.
Izaic Yorks, a senior at the University of Washington, recently ran a mile in 3:53 — the fastest mile of any American collegiate athlete. Here, he competes on Feb. 27 in Seattle.
Stephen Brashear/Red Box Pictures
Haneen Radi, an Arab Israeli, wants to organize a marathon for her town of Tira, but was told the run couldn't include women. When she insisted, she received threats, and the back window of her car was shot out.
In an image from video of the men's event at the Beer Mile World Championships, competitors are seen poised to open their beers, which they'll guzzle before taking off on their first of four laps.
Wilson Kipsang of Kenya hoisted his country's flag after winning the New York City Marathon on Sunday. Kipsang won in an unofficial time of 2 hours, 10 minutes, 59 seconds.