22-Year Study Links Frequent TV Watching to Smaller Brain Volumes in 1,700 Adults
Updated
Updated · studyfinds.com · Aug 19
22-Year Study Links Frequent TV Watching to Smaller Brain Volumes in 1,700 Adults
3 articles · Updated · studyfinds.com · Aug 19
Summary
1,712 adults tracked for about 22 years showed smaller volumes in Alzheimer’s-vulnerable brain regions and more white-matter damage if they reported watching TV very often in midlife.
Those links held after researchers adjusted for exercise, blood pressure, diabetes, smoking, drinking and body weight, suggesting the association was not simply explained by overall fitness or vascular risk.
Workplace sitting showed the opposite pattern: participants who sat at desk jobs had larger volumes in several brain regions and less internal wiring damage, pointing to cognitive engagement as a possible factor.
Men drove much of the TV effect, with broader links to smaller brain volumes across memory, language and visual-processing areas, while women showed weaker or largely absent associations.
The observational study, published in Alzheimer’s & Dementia, cannot prove TV causes brain shrinkage because sedentary habits were self-reported and not directly measured at the later brain-scan visit.