Runners and stress fractures: why you should start taking vitamin D

Research shows that athletes report overwhelmingly high rates of vitamin D deficiency

Ultrarunner Tim Tollefson shares mental health challenges in new film

As the California-based runner reveals, male athletes as well as females may be affected by eating disorders

Have a blast on your easy runs (just like Olympian Molly Seidel)

If Molly can run a 37-minute mile, surely you can slow down your pace on easy runs