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 ...

2025 is wrapping up, which means it's time to check in on your life goals and start building new habits. If in 2026 you want to be part of an ever-growing trend of runners, the Apple Watch can be a ...