How far you go in these long runs depends on your skill and experience, but Mackey says 45 minutes is a good starting point ...

Training for a marathon? We spoke with experts to figure out whether hill repeats or tempo runs are the fastest path to ...

Running too fast will leave you too tired to hit your splits in workouts. We have tips to dial in the right speed.

A straightforward guide to the simple, science-backed habits that can fire up your metabolism. It’s a road map to burning calories more efficiently without extreme dieting. Learn 20 easy tricks—from ...