Ruy Ueda aims to set the new fastest-known time for running all of Mount Fuji’s main trails in one stroke. For ultrarunner Dylan Bowman, getting into the sport wasn’t initially a way to participate in ...

The world’s largest running event returns for its 13th edition. Runners and wheelchair-users across the globe start together, all moving for one shared goal: to find a cure for spinal cord injury. In ...

Noticeable changes in heart rate, like a 6 to 10 percent drift, also signal aerobic decoupling, says Norris. For example, if ...