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Tags: exercise | workouts | appetite | brain response to food after exercise | food cues | food intake | physical activity

Researchers: Exercise Reduces Appetite

Wednesday, 26 September 2012 07:47 AM EDT

Exercise reduces people's motivation to eat, according to a small new study that found just 45 minutes of brisk walking lowers the brain's response to food that day, regardless of a person's body weight.

"This study provides evidence that exercise not only affects energy output, but it also may affect how people respond to food cues," said Brigham Young University professor James LeCheminant in a university news release.

In conducting the study, researchers led by Bliss Hanlon, a former BYU graduate student, measured the brain activity of 18 normal-weight women and 17 obese women as they looked at 120 pictures of food. Women were also shown 120 pictures of flowers to serve as a "control" or comparison.

The brain measurements were taken twice. The first assessment occurred one hour after the women walked briskly on a treadmill for 45 minutes. One week later, the researchers measured the women's brain activity again on a morning free of exercise. On both days, the women tracked their food intake and physical activity.

Women had less interest in food following a workout, the researchers found. They also noted the women did not eat more on the day they exercised to "make up" for the calories they burned.

"We wanted to see if obesity influenced food motivation, but it didn't," LeCheminant said. "However, it was clear that the exercise bout was playing a role in their neural responses to the pictures of food."

The researchers said that more research is needed to determine how long the reduction in motivation for food lasts following a workout, particularly if people engage in long-term exercise regimens.

The study was published online and in the October issue of Medicine & Science in Sports & Exercise.

More information:

The U.S. National Library of Medicine has more about exercise and physical fitness.

SOURCE: Brigham Young University, news release, September 2012

© HealthDay

People who exercise have less of an appetite after working out, whether they are of normal weight or obese, a small study showed.
exercise,workouts,appetite,brain response to food after exercise,food cues,food intake,physical activity
Wednesday, 26 September 2012 07:47 AM
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