One type of sitting may pose greater dementia risk than another, study suggests

For years, researchers have believed prolonged sitting could raise dementia risk — but new findings suggest the type of sitting may matter more than previously thought.

The research, which was published in the American Journal of Preventive Medicine in March, found that replacing mentally passive sedentary behavior with mentally active sedentary behavior was associated with a significant reduction in dementia risk.

Mentally active sedentary behaviors could include reading, office work...