A major clinical study has revealed that a straightforward brain-training exercise can cut dementia risk by 25 percent. Researchers announced the results on Monday. The study employed a randomized controlled trial, widely regarded as the most rigorous research approach.
Over 2,800 adults aged 65 and above participated in the study. They engaged in structured cognitive training sessions, and scientists monitored their health over 20 years through regular follow-ups to track long-term outcomes.
The results showed that one specific training method delivered significant protection against dementia. Importantly, the exercise required less than 24 total hours of training. Researchers say the discovery offers a practical and affordable way to support brain health.
Marilyn Albert, a co-author from Johns Hopkins University, emphasized the significance of the findings. She explained that the research finally provides clear evidence of a preventive strategy.
Speed-Based Cognitive Training Shows Strong Impact
Participants were divided into groups that practiced speed training, memory training, reasoning exercises, or no training. Researchers conducted sessions twice a week for five weeks. Later, participants completed booster sessions after one and three years.
Among all approaches, speed training produced the strongest results. The exercise required participants to quickly identify objects such as cars and road signs appearing on a computer screen. The program adjusted difficulty based on individual performance.
Over time, researchers observed consistent benefits. After 20 years, Medicare records showed significantly fewer dementia cases among participants who completed the speed training. Meanwhile, memory and reasoning exercises did not show meaningful long-term effects.
Experts believe the exercise may strengthen brain connectivity. However, researchers continue to investigate the exact biological mechanism.
Global Implications for Dementia Prevention
Dementia currently affects around 57 million people worldwide, according to the World Health Organization. It ranks among the leading causes of death globally. Therefore, effective prevention strategies remain a major public health priority.
Researchers stress that not all brain-training programs deliver proven benefits. They advise individuals to rely on evidence-based approaches rather than marketing claims. The tested training program adapts to each user’s ability level, which may explain its effectiveness.
The research also points to major economic advantages. Experts estimate that lowering dementia cases by 25 percent could save billions in healthcare spending. As a result, policymakers and medical professionals might consider including structured cognitive exercises in preventive healthcare plans.
The study has been published in the journal Alzheimer’s and Dementia: Translational Research and Clinical Research. Researchers say the results represent a meaningful advancement toward practical and effective strategies for preventing dementia.
