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Sedentary Screen Time Linked to Higher Dementia Risk, Study Reveals

KVIA•Tuesday, April 7, 2026 at 1:05 AM•CNN Newsource

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A recent study published in the American Journal of Preventive Medicine indicates that engaging in mentally passive activities, such as watching television, is associated with a higher risk of developing dementia. The research followed over 20,000 adults in Sweden for nearly two decades, revealing that those who participated in mentally stimulating activities, like puzzles or reading, had a significantly lower risk. Specifically, substituting one hour of passive screen time with active cognitive engagement could reduce dementia risk by approximately 7%. This study underscores the importance of cognitive engagement alongside physical activity in maintaining brain health as we age.

Key Details: • Study followed 20,000 adults in Sweden for nearly 20 years. • Substituting one hour of passive activity with active engagement reduces dementia risk by 7%. • Mentally stimulating activities include reading, puzzles, and interactive hobbies. • Engagement in cognitive activities can enhance neural connections and cognitive reserve.

health cognitive-health mental-stimulation dementia sedentary-lifestyle

People & Organizations

Leana WenAmerican Journal of Preventive Medicine

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