Interval Workout

Add these bread-and-butter interval workouts to your running repertoire to boost speed and endurance.

This one-hour workout is fast and tough and will help boost your top-end run speed.

This squat- and burpee-filled interval workout is a perfect alternative for those dreading their next long run.

Mix up your winter routine with these five varying workouts that will keep your indoor workouts fresh and fun all season long.