Ethiopian runner Yomif Kejelcha etched his name in the history books on Sunday by breaking the men’s world record at the Valencia Half Marathon, finishing the race in an astonishing time of 57:30.
Smash your PR goals with these tips from running coaches and real runners. By Caitlin Carlson Bryan Bedder//Getty Images Jessie Zapo finished her first half marathon—in 2006 in the NYRR ...