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Poor stress responses may lead to obesity in children
Date:2/15/2013

UNIVERSITY PARK, Pa. -- Children who overreact to stressors may be at risk of becoming overweight or obese, according to researchers at Penn State and Johns Hopkins University.

"Our results suggest that some children who are at risk of becoming obese can be identified by their biological response to a stressor," said Lori Francis, associate professor of biobehavioral health. "Ultimately, the goal is to help children manage stress in ways that promote health and reduce the risks associated with an over- or under-reactive stress response."

Francis and her colleagues -- Douglas Granger, director of the Center for Interdisciplinary Salivary Bioscience Research at Johns Hopkins University, and Elizabeth Susman, Jean Phillips Shibley Professor of Biobehavioral Health at Penn State -- recruited 43 children ages 5- to 9-years-old and their parents to participate in the study.

To examine the children's reactions to a stressor, the team used the Trier Social Stress Test for Children, which consists of a five-minute anticipation period followed by a 10-minute stress period. During the stress period, the children were asked to deliver a speech and perform a mathematics task. The team measured the children's responses to these stressors by comparing the cortisol content of their saliva before and after the procedure.

The researchers also measured the extent to which the children ate after saying they were not hungry using a protocol known as the Free Access Procedure. The team provided the children with lunch, asked them to indicate their hunger level and then gave them free access to generous portions of 10 snack foods, along with a variety of toys and activities. The children were told they could play or eat while the researchers were out of the room.

The results appeared online in the December 2012 issue of the journal Appetite.

The team found that, on average, the children consumed 250 kilocalories of the snack foods during the Fre
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Contact: Sara LaJeunesse
SDL13@psu.edu
814-863-4325
Penn State
Source:Eurekalert

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