Washington: A new study from Brigham Young University has challenged the common assumption that you can “work up an appetite” with a vigorous workout.It found that 45 minutes of moderate-to-vigorous exercise in the morning actually reduces a person’s motivation for food. Professors James LeCheminant and Michael Larson measured the neural activity of 35 women while they viewed food images, both following a morning of exercise and a morning without exercise. They found their attentional response to the food pictures decreased after the 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 measured the food motivation of 18 normal-weight women and 17 clinically obese women over two separate days. On the first day, each woman briskly walked on a treadmill for 45 minutes and then, within the hour, had their brain waves measured. Electrodes were attached to each participant’s scalp and an EEG machine then measured their neural activity while they looked at 240 images – 120 of plated food meals and 120 of flowers.The same experiment was conducted one week later on the same day of the week and at the same time of the morning, but omitted the exercise. Individuals also recorded their food consumption and physical activity on the experiment days.
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