Do you run, jog or use a stair climber to burn calories and lose weight? How long do your sessions normally last? 20 minutes, 30 minutes? Longer? If you’re only working out for 30 minutes then you’re not maximizing your opportunity to burn belly fat. You’re actually stopping right at the point where you’re about to get the maximum benefit from your workout. You see when we do cardiovascular exercises we are strengthening our heart and lungs, how ever the energy we’re using to push ourselves for the first 15-20 minutes actually comes from energy stored in our muscles. It’s after that when we begin to lose fat because we’re burning it for energy.