Weight-Loss Tip: Upgrade Your Post-Workout Snack! Sports scientists have long advocated having a bite after exercising to help promote muscle repair. An even more compelling reason: less belly fat. Exercise activates cortisol, a stress hormone that gives you that extra surge to push until the end of spin class, says sims. But lingering in that state for too long can backfire; cortisol not only inhibits the muscle-repair process but also alters your metabolism so that your body stores more calories as fat (typically in the abdominal region) instead of burning them off. More weight-loss tips: http://ow.ly/9l008 read more..