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Additionally, if mothers didn’t stay physically active, children tended to gain weight “across the board,” researchers said.
No such link was found if a father lost weight.
The research suggests mothers are still the parents primarily responsible for activities and meals, according to Kvaløy.
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But education seemed to play a role, too. On average, adolescents of parents with high education levels had lower BMIs.
More research concerning such possible “causal mechanisms of obesity development in children, including the impact of lifestyle changes within families, will help healthcare professionals, policy-makers and politicians to improve public obesity prevention strategies,” researchers concluded.
Though the study had a large sample size and used standardized methods by health personnel to identify trends, researchers only examined two obesogenic factors (weight and physical activity) and relied heavily on self-reported physical activity levels.
Read the full study, published in the journal BMJ Open, at bmjopen.bmj.com.