There’s a reason that well-developed training plans don’t immediately kick off with sprint workouts or 18-mile runs: The body needs time to gradually adapt to the demands of training. Periodized ...

If you’re a casual runner looking to log more miles this year, signing up for a race like a half or full marathon can be a great motivator. But before going full-force into a race training plan, it’s ...

Whether your goal is your first 5K or an ultramarathon, you want to follow a training plan. And every good training plan has one thing in common: phases. Each training phase—base, build, peak, taper, ...