A trainer says this workout plan will increase the 'afterburn effect' in less than 20 minutes a day

HIIT workouts can boost your metabolic rate (helping you burn more calories throughout the day). And science backs up this ...
Yahoo

Forget the gym — you’ll keep burning calories even after this 20-minute HIIT workout is over

Forget hours running on the treadmill or the elliptical machine at the gym — if you’re short on time and looking for a way to torch calories, you’re better off doing a quick HIIT workout. You don’t ...