Exercise Lowers Blood Pressure And Sugar, Reducing Dementia RiskModerate physical activity helps preserve memory and cognitive functions and reduces the risk of dementia. Vinogradov, the link between physical health and cognitive preservation is supported by scientific data, including meta-analyses. Physical activity supports brain health through several mechanisms:Metabolic cleaning: Exercise enhances the removal of metabolic waste products from the brain, which helps prevent age-related changes. Exercise enhances the removal of metabolic waste products from the brain, which helps prevent age-related changes. Prevention of comorbidities: Regular activity helps prevent hypertension and diabetes mellitus—conditions often caused by hypodynamia (lack of movement) that can lead to dementia.