It’s Not Memory. It’s Speed. For years, we’ve been told to protect our memory - remember more, recall faster, don’t forget. But one of the strongest predictors of how well your brain ages isn’t memory at all. It ’s speed. In the landmark ACTIVE study (Advanced Cognitive Training for Independent and Vital Elderly) , nearly 3,000 older adults were followed over time to understand how different types of brain training impact cognitive health. Participants were assigned to memo