Research shows that men and women over 40 burn far more calories from fat..

If you want to melt off over 13,000 calories of fat (that's about four really fast pounds), you need to stop working out for hours at a time. Even 40 minutes is too long. And you need to WALK. Research shows that men and women over 40 burn far more calories from fat when you walk briskly on a relatively empty stomach.