High-intensity interval training burns calories, boosts metabolism, burns fat and improves heart health. Try it with this one month HIIT walking workout plan.

HIIT is unique in that it's a surprisingly effective workout while requiring only a minimal amount of time.

They're meant to be fast and furious, but how long should a HIIT workout be? Fitness trainers share their thoughts.

The best HIIT exercises vary from person to person. Building a routine suited to your individual preferences, abilities, and fitness goals is the key to success. High intensity interval training ...

Try these 10 HIIT workouts for beginners. These free at home HIIT workout videos will speed up the metabolism, burn calories and build strength and endurance.

This 20-minute upper body bodyweight workout from Women's Health+ Ultimate HIIT Challenge will help improve your strength and cardiovascular endurance.

Treadmill HIIT workouts boost metabolism, improve heart health and help you lose weight. Try these low-impact high intensity interval walking and running workouts.