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Study Links Passive Screen Time to Increased Dementia Risk in Adults

KVIA•Monday, April 6, 2026 at 2:00 PM•CNN Newsource

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Recent research from Sweden highlights the potential dangers of passive screen time, revealing that activities like watching television can significantly elevate the risk of developing dementia. The study, which followed over 20,000 adults for nearly two decades, found that those engaging in mentally passive activities had a higher likelihood of dementia, while mentally stimulating tasks, such as puzzles and reading, offered protective benefits. Replacing one hour of passive activity with mentally engaging tasks could reduce dementia risk by approximately 7%. This underscores the importance of cognitive engagement alongside physical activity for maintaining brain health as we age.

Key Details: • Study followed over 20,000 adults aged 35-64 for nearly 20 years. • Replacing one hour of passive activities with engaging tasks can lower dementia risk by 7%. • Mentally engaging activities include reading, puzzles, and social interactions. • Consider incorporating creative hobbies like knitting or drawing to stimulate the brain.

health dementia brain-health mental-engagement sedentary-lifestyle

People & Organizations

Dr. Leana WenAmerican Journal of Preventive Medicine

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