Elsevier Mar 26 2026 New research distinguishing between passive and mentally active sitting in association with dementia has found that adults who engaged in extended durations of mentally passive sedentary behaviors had a higher risk of dementia. Replacing passive with mentally active sedentary behaviors was shown to reduce the risk of dementia onset in later life. The study in the American Journal of Preventive Medicine , published by Elsevier, has the potential to inform public health