Recent research studies show HIIT training, allows for excellent muscle-building and fat-burning benefits. HIIT is s combination of brief, very-high intensity bursts of cardio exercise followed by equal or longer periods of rest. I incorporate this system into my weekly training routine. Try the treadmill workout this week and tell me how you feel. If you don’t have access to a treadmill, find some hills outside where you can push your heart rate and follow this fat burning plan.