Mental engagement during sitting linked to lower dementia risk
A Swedish study of over 20,000 adults aged 35–64 found that mentally active sedentary activities (such as reading, solving puzzles, or learning a new skill) were associated with a lower risk of developing dementia, while mentally passive sitting (e.g., watching TV) showed no protective effect and may increase risk. Replacing passive sitting with mentally engaging activities or light physical activity could modestly reduce dementia risk, though the study is observational and cannot prove causation; replication is needed before guiding guidelines.
