Intensity May Make a Difference
Could the intensity of a workout support weight management beyond the basic calories in and calories out concept? Recent research suggests the intensity of a workout may make a difference. Not only are we burning more calories, but also may gain control of our appetite.
A study published this month in The American Journal of Clinical Nutrition put 15 lean and healthy men to an appetite test. The purpose of the study was to evaluate the effect of exercise on central appetite regulation through the use of magnetic resonance imaging (MRI) and visual stimuli to food. The subjects were evaluated after two 60-minute trials working at 70% of their aerobic capacity compared to a resting control trial.
Instead of a ravenous post-workout appetite like some might expect, just the opposite held true. Exercise actually reflected satisfaction in the reward-related regions of the brain when images of low calorie foods were presented compared to the high calorie foods. Exercise suppressed subjective appetite response, increased thirst, suppressed the hunger-stimulating hormone ghrelin, and enhanced the appetite reducing hormone peptide YY.