Television might actually be rotting our brains. Watching TV for extended periods of time could increase the risk of dementia and Alzheimer’s disease, new research says. To combat this danger, experts recommend taking breaks from binge-watching and engaging in more mentally stimulating activities.
Frequent TV watching in midlife was linked to reduced volume in the parts of the brain vulnerable to Alzheimer’s disease, according to a study published in Alzheimer’s & Dementia. The diminished brain systems include those associated with memory and cognition, as well as executive functioning. More surprisingly, the brain volume reduction was not tied to sedentary behaviour, but specifically to watching TV. “People whose jobs involved sitting for much of the day tended to have healthier-looking brains,” said ScienceAlert. Also, “when the researchers accounted for differences in overall physical activity, that didn’t seem to impact the outcome”.
“For years we’ve focused on how much people sit,” David Raichlen, a professor of biological sciences and anthropology at the USC Dornsife College of Letters, Arts and Sciences, and the senior author of the study, said in a news release. But these findings “suggest we should also pay attention to what they’re doing while they’re sitting”. For example, working from home, while sedentary, is more “intellectually stimulating” compared to watching TV, said the release.
Because watching TV appears to specifically affect the brain, “we might eventually see a different approach to health guidance around sedentary activities”, added the release. “The goal is not to eliminate passive rest,” Dung Trinh, a doctor at the MemorialCare Medical Group and chief medical officer of the Healthy Brain Clinic in Irvine, California, told Healthline. It is to “build more cognitively engaging moments into the day”.
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