Parental stress is linked to weight gain in children, according to a new study from St. Michael’s Hospital (Toronto, ON, Canada).
The study found that children whose parents have high levels of stress have a body mass index (BMI) about 2 percent higher than those whose parents have low levels of stress. Children with higher parental stress also gained weight at a 7 percent higher rate during the study period than other children.
Those figures may sound low, said lead author Dr. Ketan Shankardass, but they’re significant because they are happening in children, whose bodies and eating and exercise habits are still developing. Plus, if that weight gain continues and is compounded over a lifetime, it could lead to serious obesity and health issues.
Shankardass, a social epidemiologist with the hospital’s Centre for Research on Inner City Health, studied data collected during the Children’s Health Study, one of the largest and most comprehensive investigations into the long-term effects of air pollution on the respiratory health of children.
The childrens’ BMI was calculated each year. Their parents were given a questionnaire to measure their perceived psychological stress that asked how often in the last month they were able or unable to control important things in their life and whether things were going their way or their difficulties were piling up so high they could not overcome them.
Shankardass said he believes this is the first study to link parental stress to weight gain in such young children. His research was published in the journal Pediatric Obesity. He added that it was not clear why the link between stress and obesity exists.
Parents could change their behavior when they are stressed, to reduce the amount of physical activity in the household or increase the amount of unhealthy food available, Shankardass added. Parental stress could also create stress for the children, who cope by eating more or exercising less, or whose stress leads to biological changes that cause weight gain, he said.Shankardass said that rather than focusing only on getting parents to change their behavior, it would be useful to focus on interventions that can support families living in challenging conditions, such as making sure they have a reliable supply of healthy food, an opportunity to live in a better neighborhood and other financial or service resources to help cope with stress.