Can Brain Training Delay Dementia? Hope or Hype?

As we age, in the forefront of our thoughts is often, well, brain health. How will we feel, cognitively, as the years and decades pass? Do we have any control over our brain function, and if we do, can we use brain training to make sure we’re still “with it” and able to keep up as we age?

If you’re thinking about these questions, you’ve probably wondered whether “brain training” programs do more than just entertain. There’s actually exciting news emerging from long-term research that could change how we think about cognitive aging.

A major study following older adults for 20 years suggests that a particular type of brain training — not all brain games — may help reduce the risk of developing dementia, including Alzheimer’s disease, by about 25% over two decades.

New Research: Brain Training and Dementia 

Researchers analyzed data from one of the largest and longest-running cognitive training trials ever conducted — the Advanced Cognitive Training for Independent and Vital Elderly (ACTIVE) study, which began in the late 1990s. More than 2,800 people aged 65 and older were randomly assigned to one of three training groups (memory, reasoning, or processing speed) or a control group that received no training.

All participants completed around 10 sessions over five to six weeks. Some also received “booster” sessions one and three years later. What the follow-up analysis revealed is compelling:

• Participants who completed speed-of-processing training and at least one booster session were about 25% less likely to be diagnosed with dementia over the next 20 years compared with those who received no training.
• Those who trained in memory or reasoning — or who did not have booster sessions — did not see the same long-term protective benefit.

Speed training is different from traditional memory drills. It focuses on sharpening visual attention and processing speed — essentially helping the brain get faster at noticing and responding to visual information under time pressure. These exercises tend to be adaptive, meaning the tasks become more challenging as performance improves.

Researchers believe this kind of training taps into what is known as implicit learning — automatic, procedural skills — rather than just memorizing facts or reasoning through problems. This may help build cognitive resilience that lasts well into later life.

Importantly, the protective effects were seen even though the total amount of training time was relatively small — less than 24 hours spread over a few years. That might feel especially hopeful for older adults who want proactive steps they can take without feeling overwhelmed.

Expert Caution: Brain Training and Dementia 

Experts caution that this kind of training is not a cure, and more research is needed to understand exactly how and why it may delay clinical dementia. However, the findings add to a broader picture suggesting that targeted cognitive engagement — especially when combined with other healthy habits like physical activity, good sleep, and cardiovascular care — might help support brain health as we age.

This research also helps clarify why not all brain training programs have the same value. Many commercial “brain games” target memory or logic puzzles — which may improve performance on the specific tasks but have not been shown to reduce long-term dementia risk.

Final Thoughts: Brain Training and Dementia 

So what’s the takeaway?

While there is no guaranteed way to prevent dementia, new evidence suggests that specific cognitive training — especially that which speeds how quickly the brain processes information — may be a promising tool in the broader effort to preserve cognitive function and delay the onset of clinical dementia.