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BYU: Exercise can Kill Your Appetite

Friday, 14 September 2012 01:21 PM

New research is challenging the idea that exercise helps you “work up an appetite.” In fact, the study by Brigham Young University scientists has found a moderate-to-vigorous workout has the opposite effect – it significantly reduces the desire for food, at least in the short term.
BYU’s James LeCheminant and Michael Larson measured the brain activity of 35 women while they viewed food images, both following a morning of exercise and a morning without it. They found their response to the food pictures decreased after a brisk workout.
"This study provides evidence that exercise not only affects energy output, but it also may affect how people respond to food cues," LeCheminant said.
The study, published online in the journal Medicine & Science in Sports & Exercise, involved 18 normal-weight women and 17 clinically obese women over two days.
On the first day, the women walked on a treadmill for 45 minutes and then, within the hour, had their brain waves measured as they looked at 120 images of plated food meals. The same experiment was repeated one week later, but the women did not exercise.
Participants also recorded their food consumption and physical activity on the experiment days.
The results showed the 45-minute workout not only produced lower brain responses to the food images, but also resulted in an increase in overall physical activity that day, regardless of the women’s weight. What’s more, the women did not eat more food on the exercise day to make up for the extra calories they burned in exercise. In fact, they ate about the same amount of food on the non-exercise day.
"The subject of food motivation and weight loss is so complex," Larson said. "There are many things that influence eating and exercise is just one element."

© HealthDay

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New research is challenging the idea that exercise helps you 'work up an appetite.'
Friday, 14 September 2012 01:21 PM
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