Cardiorespiratory Fitness May Lower Your Risk of Dementia HealthlineModerate, vigorous exercise boosts cognitive abilities for 24 hours Medical News TodayExercising for 30 minutes improves memory, study suggests The GuardianShort-term cognitive boost from exercise may last for 24 hours, suggests study Medical XpressStaying Fit Can Keep Seniors' Brains Sharp U.S. News & World Report