Want to Train Your Brain? Give It Something Worth Doing.

A game can make your score go up. The harder question is what that improvement means. You may become quicker at spotting a pattern in one app without becoming better at every kind of thinking, more independent in daily life, or less likely to develop dementia. “Brain training” covers several different activities, and their results should not be treated as interchangeable.

A meaningful activity can give your mind work to do without pretending to be medicine. Learning a language, making something with your hands, dancing, teaching, using unfamiliar technology, helping with a community project or taking on a demanding piece of work can all involve attention and problem-solving. Their value can include pleasure, purpose, movement, conversation or skill—not only a hoped-for score on a cognitive test.

Brain training is not the same as every kind of mental activity

In research, cognitive training usually means practising structured tasks designed to exercise a selected ability, such as memory, reasoning or speed of processing. A participant might repeat exercises, receive feedback and practise over a defined number of sessions. A commercial brain-game app may borrow some of these features, but that does not mean it has been tested in the same way as a specific research programme.

Other activities are mentally engaging without being formal cognitive training. A dance class, craft group or language lesson may involve new learning, decisions and attention, but it also brings a particular setting, teacher, level of difficulty and social experience. It is too simple to describe every enjoyable challenge as “brain training,” just as it is too simple to assume that one exercise programme will produce the same effect in every learner.

What a long-running trial actually found

The ACTIVE trial tested memory, reasoning and speed-of-processing training in 2,832 independently living US adults. Their average age at the start was about 74. Participants received ten training sessions and some were offered later booster sessions. Researchers followed outcomes over time, including measured thinking skills and reports of difficulty with instrumental activities of daily living—tasks such as managing everyday activities independently.

At ten years, reasoning and speed training were still associated with improvement in the abilities those programmes had targeted; the memory-training effect was not maintained on the measured memory task. Participants in all three training groups reported less decline in everyday function than the no-contact control group. This is a notable result from a large randomised trial, but it concerns specific programmes, a selected volunteer sample and particular outcomes. It does not prove that every brain game works, that any app prevents dementia, or that the result will be the same for everyone.

It also helps to distinguish practising a skill from transferring it. If you repeatedly practise remembering a list, you may become better at that kind of exercise. A “near transfer” would be an improvement on a related task; a broader transfer would mean improvement in a quite different ability or in daily life. Evidence for one kind of outcome should not be presented as evidence for all the others.

What brain games can—and cannot—promise

A structured programme may help with the specific tasks it teaches. Some research has also examined whether training effects carry into everyday activities, as in ACTIVE. But those results do not validate every product that claims to make a person smarter, improve general memory, delay ageing or prevent dementia. Check whether a claim is about a trained task, a related test, everyday function, or a health condition; they are different endpoints.

The World Health Organization’s second edition of its dementia-risk-reduction guidance brings together evidence on health behaviours, health conditions, environmental factors and tailored multidomain approaches. It also identifies areas where more evidence is needed. That broader public-health picture is not a stamp of approval for a particular app. Nor does it mean that a person must turn leisure into a prevention programme.

If a game is enjoyable and affordable, you can play it for the game. Set a boundary around time or spending if that helps. Be cautious of promises that you can prevent dementia, reverse cognitive decline or “rewire” your brain in a guaranteed number of days. No single activity can promise those outcomes.

Choose an activity with a reason to return

Instead of asking only “Which task gives my brain the hardest workout?”, consider what you want the activity to add to your week. A good choice might have one or more of these features:

• It matters to you. A real reason to learn or take part is often more compelling than a generic health score.
• It asks something new of you. You have to notice, remember, make decisions or adapt, but you are allowed to be a beginner.
• It has a workable level of challenge. You can see progress without feeling that every session is a pass-or-fail test.
• It fits the life you have. Cost, travel, time, energy and access all affect whether a plan is realistic.
• It gives you something back now. Enjoyment, a finished object, a conversation, a useful skill or a sense of contribution can matter even if a cognitive test never changes.

Some possibilities combine several parts of life. A dance class can ask you to learn steps, respond to music, move and share a room with other people. A craft can involve planning, precision and solving practical problems. Teaching or mentoring can make you organise what you know and respond to another person’s questions. Learning digital skills may help you handle tasks that have become part of everyday life. Volunteering can connect a task to a community need.

These examples are not proven dementia-prevention prescriptions. People vary in what feels enjoyable or accessible, and not every activity needs to be social or physically demanding. If a group is not comfortable, a solo project or one-to-one lesson may suit you better. Choose the kind of challenge that you are willing to revisit.

Make it a small experiment, not another obligation

Try this seven-day prompt. Choose one activity you have been curious about and identify the smallest first step: find a beginner class, ask a friend to show you a craft, practise a dance sequence, volunteer for one task, or set up a short lesson in a digital skill. Decide in advance when you will try it and what would make it worthwhile beyond a score.

Afterwards, ask: Was I curious? Did the difficulty feel manageable? Did I enjoy any part of it? Would another format or pace work better? You can continue, change the activity or stop. A short experiment is information about fit, not a test of talent or willpower.

If you want ideas, our guide to learning a language in midlife separates the enjoyment of learning from claims about dementia prevention. You could also explore movement for physical freedom, friendship and connection, or the evidence on vascular health and brain health.

When a change in thinking needs attention

Difficulty with a new game does not diagnose a health problem, and a high score does not rule one out. People learn at different speeds and may have different experience with a particular device or task. If memory or thinking changes are persistent, worsening or affecting everyday life, discuss them with a GP or another appropriate healthcare professional rather than relying on a game result.

There is a useful distinction between supporting a full life and treating a condition. Meaningful activity can be worthwhile for reasons that are immediately visible: curiosity, connection, confidence, contribution or pleasure. Research can help clarify whether a defined training programme improves a particular skill. Neither should be turned into a promise that a hobby will prevent illness.

Sources / Further reading

• World Health Organization: Risk reduction of cognitive decline and dementia, second edition, 2026.
• Rebok et al., “Ten-Year Effects of the ACTIVE Cognitive Training Trial on Cognition and Everyday Functioning in Older Adults,” Journal of the American Geriatrics Society, 2014.

This article is for general education and is not a cognitive assessment, dementia-prevention plan or personal medical advice. If a change in memory or thinking is affecting your daily life, speak with an appropriate healthcare professional.