Treadmill interval training can transform your running, whether you’re chasing a 5K PR or building marathon endurance. By mixing short, high-intensity bursts with longer, sustained efforts, you’ll ...

Overtraining could crush your progress. Learn how to run interval workouts more efficiently with this coach-backed advice.

Interval running condenses the powerful effects of regular running into shorter, high-intensity bursts. Research shows it can improve cardiovascular health, regulate blood sugar, and reduce body fat ...

Throughout the long history of the sport of running, training innovations have come primarily from athletes and coaches, not scientists. With few exceptions, it’s been the folks in the trenches who ...

Our Sub-3:45 plans are designed for intermediate to advanced runners who have run at least one marathon before and want to improve their previous time. The Sub-3:45 marathon plans are designed to ...