New Study Adds Evidence That Watching Too Much Television as a Child Can Lead to Poor Health in Adulthood

A new research has found that children who watched more television were more likely to develop metabolic syndrome as an adult.

Metabolic syndrome is a cluster of conditions including high blood pressure, high blood sugar, excess body fat, and abnormal cholesterol levels that lead to an increased risk of heart disease, diabetes and stroke.

Using data from 879 participants of the Dunedin study, researchers found those who watched more television between the ages of 5 and 15 were more likely to have these conditions at age 45.

Television viewing times were asked at ages 5, 7, 9, 11, 13 and 15. On average, they watched just over two hours per weekday.

“Those who watched the most had a higher risk of metabolic syndrome in adulthood,” Professor Hancox says.

“More childhood television viewing time was also associated with a higher risk of overweight and obesity and lower physical fitness.”

There was little evidence that watching less television as an adult reduced the association between childhood television viewing and adult health.

“While, like any observational study, researchers cannot prove that the association between television viewing at a young age directly causes adult metabolic syndrome, there are several plausible mechanisms by which longer television viewing times could lead to poorer long-term health.

“Television viewing has low energy expenditure and could displace physical activity and reduce sleep quality,” he says.

“Children today have far more access to screen-based entertainment and spend much more time being sedentary. It is likely that this will have even more detrimental effects for adult health.


Nathan MacDonell, Robert J. Hancox. Childhood and Adolescent Television Viewing and Metabolic Syndrome in Mid-Adulthood. Pediatrics, 2023; DOI: 10.1542/peds.2022-060768

University of Otago. “Link found between childhood television watching and adulthood metabolic syndrome.” ScienceDaily. ScienceDaily, 24 July 2023. <>.

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