Navigation Links
Study finds link between individual stress and adolescent obesity

AMES, Iowa -- Stress may indeed be a direct contributor to childhood obesity. That's according to a new Iowa State University study finding that increased levels of stress in adolescents are associated with a greater likelihood of them being overweight or obese.

The study of 1,011 adolescents (aged 10-15) and their mothers from low income families living in three cities -- Boston, Chicago and San Antonio -- was posted online by the Journal of Adolescent Health ( and will be published in its August issue. Forty-seven percent of the teens in the sample were overweight or obese, but that percentage increased to 56.2 percent among those who were impacted by four or more stressors.

"We found that an adolescent or youth who's more stressed -- caused by such things as having poor grades, mental health problems, more aggressive behavior, or doing more drugs and alcohol -- is also more likely to be overweight or obese," said lead author Brenda Lohman, an Iowa State assistant professor of human development and family studies (HDFS).

Susan Stewart, an ISU associate professor of sociology; and Steven Garasky, a professor of HDFS at Iowa State; joined Lohman on the research team. Former ISU faculty members Craig Gundersen, a member of the agricultural and consumer economics faculty at the University of Illinois; and Joey Eisenmann, a member of the kinesiology and pediatrics faculty at Michigan State University; also contributed to the study.

The study analyzes data obtained from the "Welfare, Children and Families: A Three-City Study" -- a six-year longitudinal investigation. Researchers measured the height and weight of the adolescents to determine their body mass index, which was subsequently used to determine weight status based on two widely used classification systems. Adolescent food insecurity status and individual, maternal and family stressors were also determined through interviews.

The five factors used to determine the individual stressor index for the adolescents were:

  • Academic problems
  • Consumption of drugs and alcohol
  • Depression or poor mental health levels
  • Acting out or aggressive behaviors
  • Lack of future orientation

The researchers wrote that the adolescents' relationship with stress and becoming overweight may be a result of biological (perturbed hypothalamic-pituitary-adrenal glands) as well as behavioral responses to stress, such as overeating and lack of exercise.

"It could possibly be that the obesity is leading to these stressors too," Lohman said. "And so the work that we're doing right now looks at which one of these is really coming first: the stressors or the obesity. We know that it is cyclical and that all of these factors just compound on each other."

The study also found that a mother's stress, coupled with food insecurity in the household -- a situation in which an individual cannot access enough food to sustain active, healthy living -- contributes to a child's chances of becoming overweight or obese.

"In our past research, we did not find this association for older youth (ages 11-17), we only found it for young children (ages 3-10) who were in a house that had enough food or were food-secure," Lohman said. "But it may be that the adolescents are more cognitively aware of what's going on in the household and they take on their mothers' stress as well. This may be exacerbated in houses where there's not enough food."

While this study singles out mothers, fathers aren't immune to their child's weight status either.

"My own research focuses on fathers and shows that fathers, too, have an effect on children's eating habits and obesity," said Stewart, author of the book "Brave New Stepfamilies," who had another study posted by the Journal of Adolescent Health last month on nonresident father involvement and adolescent eating patterns.

"In our latest study, we found that kids who are involved with nonresident dads eat better -- more vegetables, less fast food," she said. "However, similar to the Lohman study, living with a single mom was associated with worse eating habits."

Lohman says the new research should emphasize the need for healthcare professionals to take a more holistic approach in their treatment of obese teens.

"We absolutely have to focus on their (teens) health, well-being, nutrition and exercise -- and education of these things for them," she said. "But we really need to also look holistically at their life and work towards reducing stress and rates of food insecurity for those adolescents as well."

Gunderson, Garasky and Lohman also just published a study out today on the relationship between food insecurity and adolescent obesity. Among 2,516 participants (1,239 girls, 1,277 boys) drawn from the 2001-2004 National Health and Nutrition Examination Survey, 37 percent of families were considered food insecure. Using five different measures of obesity -- BMI, waist circumference, triceps skinfold thickness, trunk fat mass, and percent body fat -- researchers determined that 15 to 45 percent of children were classified as obese. Yet they found no statistically significant relationship between food insecurity and obesity, regardless of which indicator was used.


Contact: Mike Ferlazzo
Iowa State University

Related biology news :

1. WWF study says climate change could displace millions in Asias Coral Triangle
2. Study reveals conflict between doctors, midwives over homebirth
3. UNC study identifies genetic cause of most common form of breast cancer
4. Comprehensive genetic study paves way for new blood-pressure medicines
5. Study finds novel genetic risk factors for kidney disease
6. New study: Home energy savings are made in the shade
7. Study finds homicidal poisoning rising, more likely in infants and elderly
8. OHSU researchers study the idling brain
9. Study finds childrens activity levels not influenced by more PE time in school
10. Study finds link between hot flashes and lower bone density in women
11. Songbird study from CSHL, CCNY provides concrete measure of biologys impact on culture
Post Your Comments:
(Date:11/12/2015)... -- A golden retriever that stayed healthy despite having the ... a new lead for treating this muscle-wasting disorder, report ... MIT and Harvard and the University of São Paolo ... Cell, pinpoints a protective gene that boosts muscle ... Boston Children,s lab of Lou Kunkel , PhD, ...
(Date:11/10/2015)... LONDON , Nov. 10, 2015 /PRNewswire/ ... segmented on the basis of product, type, ... segments included in this report are consumables, ... this report are safety biomarkers, efficacy biomarkers, ... in this report are diagnostics development, drug ...
(Date:11/4/2015)... New York , November 4, 2015 ... to a new market report published by Transparency Market ... Share, Growth, Trends and Forecast 2015 - 2022", the global ... of US$ 30.3 bn by 2022. The market is ... the forecast period from 2015 to 2022. Rising security ...
Breaking Biology News(10 mins):
(Date:11/23/2015)... --  Ceres, Inc . (Nasdaq: CERE ), an ... fiscal year ended August 31, 2015 and provided an ... --> During fiscal year 2015, Ceres refocused ... a better balance of yield, energy and nutrition. Among ... leading crop input providers and made significant progress in ...
(Date:11/23/2015)... ... November 23, 2015 , ... Shimadzu ... of its Nexera UC Unified Chromatography system. The award from R&D magazine recognizes ... products of the year in the analytical and testing category. R&D Magazine chose ...
(Date:11/23/2015)... GENEVA , November 23, 2015 ... to develop daclatasvir for 112 ... countries   --> --> ... licence for a hepatitis C medicine, signing an agreement with ... proven to help cure multiple genotypes of the HCV virus. ...
(Date:11/23/2015)... -- biochar market is estimated to ... is expected to grow with a CAGR of 17.1% ... of the global market include improved soil fertility and ... government initiatives and stringent environmental regulations, and waste management ... are the key drivers for the growth of the ...
Breaking Biology Technology: