Want to lose fat faster? We have some great advice for you.

Cardio is the cornerstone to any good weight-loss plan—especially high-intensity interval training (HIIT), in which you alternate periods of absolute maximum effort with brief periods of recovery.

To help you make those sprints as effective as possible, we talked to Phil Campbell, an interval-training expert and author of Ready, Set, Go! Fitness. Here are his top fat-burning tips.

But don't forget strength training! Try these 5 exercises to work your abs to exhaustion.