A new study from Yale University suggests that lowering parental stress could play an important role in preventing obesity among young children, alongside established strategies such as promoting healthy eating and physical activity.
Childhood obesity rates in the US have continued to rise. In 2024, the US Centers for Disease Control and Prevention estimated that approximately one in five children and adolescents met the clinical definition of obese. Recent national surveys show prevalence between 19.7% and 20% among youths aged 2–15.
Researchers led by Yale psychologist Rajita Sinha examined whether reducing parental stress could help address this problem. Their findings appear in the journal Pediatrics.
“We already knew that stress can be a big contributor in the development of childhood obesity,” said Sinha. “The surprise was that when parents handled stress better, their parenting improved, and their young child’s obesity risk went down.”
Previous research has shown that parental obesity increases the risk of obesity in children. Studies have also suggested that parental stress may contribute to early childhood weight gain.
Stressed parents are more likely to rely on fast food and adopt unhealthy eating habits that influence children’s behaviour. When stress levels are high, family routines may break down, unhealthy food choices may increase, and positive parenting behaviours may decline.
Despite these links, most childhood obesity prevention programmes focus mainly on nutrition education and physical activity. According to Sinha, such approaches often fail to produce lasting improvements.
Sinha is the foundations fund professor in psychiatry and a professor in neuroscience and child study at the Yale School of Medicine.
The research team conducted a 12-week randomised prevention trial involving 114 ethnically and socioeconomically diverse parents with overweight or obese children aged 2–5.
Participants were assigned to one of two groups. One group received the Parenting Mindfully for Health (PMH) intervention, a programme that combined mindfulness and behavioural self-regulation skills with counseling on healthy nutrition and physical activity. The control group received counseling on healthy nutrition and physical activity only.
Both groups met weekly for sessions lasting up to two hours.
Researchers assessed parental stress and children’s weight throughout the 12 week period. Children’s weight was measured again three months after the programme ended. The study also tracked positive parenting behaviours, including warmth, listening, patience, and positive affect, along with children’s healthy and unhealthy food intake before and after treatment.
Only the PMH group experienced lower parental stress levels, improvements in positive parenting behaviours, and reductions in children’s unhealthy eating. Children in this group showed no significant weight gain three months after treatment.
In contrast, parents in the control group did not show improvements in stress levels, parenting behaviours, or children’s unhealthy food intake. Their children experienced significant weight increases and were six times more likely to move into the overweight or obesity risk category at the three-month follow-up.
Researchers also found that the link between high parental stress, reduced positive parenting, and lower healthy food intake in children remained significant in the control group after three months but was no longer significant among families in the PMH programme.
“The combination of mindfulness with behavioural self regulation to manage stress, integrated with healthy nutrition and physical activity, seemed to protect the young children from some of the negative effects of stress on weight gain,” Sinha said.
The research builds on work conducted at the Yale Stress Center, an interdisciplinary consortium established with support from a 2007 National Institutes of Health Common Fund programme. The centre focuses on the biology of stress, health behaviours, and their influence on chronic mental and physical illness.
“Childhood obesity is such a major issue right now, and the results of this study are highly relevant to the current administration’s priority of reducing childhood chronic diseases,” said Sinha. “When people start moving up the weight scale, their risk of obesity related illnesses, even in children, is increased.”
Sinha said the findings support further evaluation of long-term Parenting Mindfully for Health (PMH) interventions, and that two-year outcomes from a larger cohort of families are forthcoming.
The study was co led by Wendy Silverman, the Alfred A. professor in the Child Study Center and professor of psychology, and Ania Jastreboff, the Harvey and Kate Cushing professor of medicine and professor of paediatrics.
Additional authors were affiliated with the Yale School of Medicine departments of paediatrics and neuroscience, the Yale Child Study Center, the Bethesda Group, the Chicago School of Professional Psychology, the University of New Mexico, and George Mason University.