A study published in the Journal of the American Medical Association looked at the effects of television time on cognitive behaviour and physical activity of participants over a 25 year period.

Participants were in their mid-20s when the study began and followed all the way until middle age.

No surprise here: those who watched > 3 hours of television a day had poor cognitive performance.

Those who has low physical activity and high television viewing throughout the 25 years scored almost 2 times worse than those who were active and didn’t watch much TV.

“High television viewing and low physical activity in early adulthood were associated with worse midlife executive function and processing speed.”

This is sad on so many levels. We should celebrate our twenties – go exploring, meet new people, eat weird food, make mistakes – not waste it curled up on a couch under a warm blanket binge-watching Netflix.

However, I bet the results would differ if participants watched television in a language they were learning, instead of in their maternal tongue.

Nevertheless, remember books? Go read one.

You might like: Stop staring into your screen before bed.

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