Jackie Warner's 20-Minute Calorie Blasters
Go harder and faster during your cardio sessions to burn more fat in less time.
Do one of these 20-minute calorie blasters every day to help 10 pounds melt away. Remember, the harder and faster you go during your cardio sessions, the more body fat you'll burn. That doesn't mean you need to take it all-out every time you do cardio, but try to ramp up the intensity at least a few times a week. Use the RPE as your intensity guide for these two workouts