Can You Improve Your IQ?

The short answer: yes, but modestly and with caveats. Your genetic endowment sets a broad range for cognitive potential, but where you land within that range is significantly influenced by environment, education, and lifestyle. Studies show that sustained education raises IQ by several points per year of schooling. Neuroplasticity means cognitive abilities are trainable to a degree. The things that actually work are broader than “brain training” — they include reading widely, physical exercise, adequate sleep, and engaging with genuinely challenging problems.

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What the Research Shows

Not all interventions are created equal. The table below summarises the factors with the strongest scientific support for influencing cognitive ability, along with an honest assessment of how robust the evidence is.

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What Doesn’t Work

Being honest about what the research does not support is just as important as knowing what works. A few popular approaches fall short of their claims.

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The Neuroplasticity Factor

The brain’s ability to form new neural connections persists throughout life, though it is strongest in youth. This capacity — neuroplasticity — is the biological basis for cognitive improvement at any age. Regular engagement with novel, challenging tasks builds cognitive reserve: a buffer of neural resources that helps the brain maintain function even as some connections are lost to aging or injury.

The key word is novel. Routine activities in your comfort zone don’t stimulate growth. The brain adapts and automates familiar tasks, which is efficient but doesn’t build new capacity. Growth requires struggle — the productive kind, where you are working at the edge of your current ability.

What counts as a novel challenge depends on your starting point. For someone who has never programmed, learning to code qualifies. For a software engineer, it might be studying music theory or learning to paint. The principle is consistent: engage with domains that require you to think in ways you don’t normally think. Read in a field completely outside your expertise. Take on projects that make you uncomfortable. The discomfort is a signal that your brain is building something new.

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Practical Recommendations

These seven strategies are grounded in the research discussed above. None of them is a shortcut, but all of them have evidence behind them.

1. 1

   Read widely and deeply

   Across genres and disciplines. Reading builds vocabulary, strengthens verbal reasoning, and exposes you to new conceptual frameworks. Non-fiction in unfamiliar fields is particularly effective.

2. 2

   Exercise regularly

   Aim for 150 or more minutes of moderate aerobic activity per week. Walking, swimming, cycling, running — the specific activity matters less than consistency. The cognitive benefits are well-documented.

3. 3

   Prioritise sleep

   Seven to nine hours consistently. Sleep is when the brain consolidates learning, clears waste products, and restores the executive functions that fluid intelligence depends on.

4. 4

   Learn something genuinely new

   An instrument, a language, a technical skill. The learning process itself — the struggle, the mistakes, the gradual mastery — is what stimulates neural growth. Passive consumption does not count.

5. 5

   Engage with challenging problems

   Puzzles, strategy games, complex projects at work. The key ingredient is that the problem should be hard enough to require real effort but not so hard that you give up. Psychologists call this the “zone of proximal development.”

6. 6

   Stay socially active

   Conversation and collaboration exercise cognitive flexibility. Navigating different perspectives, explaining your thinking, and processing real-time social information all engage the brain in ways that solitary activities do not.

7. 7

   Manage stress

   Chronic stress impairs working memory and executive function through elevated cortisol levels. Meditation, physical activity, adequate rest, and strong social support all help keep stress within manageable bounds.

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The Honest Bottom Line

IQ is malleable but not infinitely so. The most reliable improvements come not from trying to “get smarter” directly, but from building a life that naturally exercises your brain: ongoing education, physical health, intellectual curiosity, and sustained engagement with challenging work.

The effect sizes aren’t dramatic in adulthood — you are unlikely to move your IQ by 20 points through lifestyle changes alone. But they are real, and they compound over years. A person who reads widely, exercises regularly, sleeps well, and keeps learning will, over a decade, almost certainly maintain sharper cognitive function than someone of equal genetic potential who does none of those things.

Perhaps the most useful reframe is this: instead of asking “how can I raise my IQ score?” ask “how can I build a life that keeps my brain working at its best?” The answers turn out to be the same things that make life richer in general — learning, moving, connecting, and staying curious.