A new study suggests that spending long periods watching television may be linked to smaller brain structures. The findings add a scientific note to the long-running warning that too much TV may not be good for the mind, even if the old saying that it will “rot your brain” goes too far.

Researchers did not frame the results as proof that television directly causes these brain changes. Instead, the study points to an association, meaning heavy TV viewing and differences in brain structure appear connected. That distinction matters, because other lifestyle and health factors could also play a role.

Even so, the report adds to broader concerns about passive, sedentary screen habits. Television viewing is often different from more active forms of engagement, and scientists have been increasingly interested in how time spent sitting and consuming media may relate to long-term brain health.

The study’s results are likely to fuel further research into how daily habits affect the brain over time. For now, the takeaway is less about alarm and more about moderation: the amount of time spent in front of the TV may be one more factor worth considering in a brain-healthy lifestyle.