At Runner’s World, we love geeking out on the incredible numbers behind great running performances. When 16-year-old Cooper Lutkenhaus recently broke almost every high school 800-meter record in the ...

I am an avid runner, and have been for many years. It started on a whim. A friend asked me if I wanted to participate in Tough Mudder, an obstacle course-style race, just after I graduated from ...

View post: I'm a Cardiologist. Every Man Over 50 Should Get These 5 Health Tests to Prevent Heart Attack Risk Nelson Thomas ran his first 5K since a foot amputation last year. He shared, “This run ...