As any population ages, cognitive decline becomes more of an issue. Maintaining a physically active lifestyle has been shown to help reduce age-related cognitive declines and incidence of dementia. This research review focuses on a systemic review with meta-analysis summarizing the evidence specific to cognitive benefits of exercise for people over 50. Prior research has shown conflicting results, due in part to the use of restrictive inclusion criteria. However, the results of this review show promise for both aerobic and resistance training.