Does a faster walk mean a sharper mind? What studies found

Faster walkers tend to score higher on thinking tests, and a slowing walk can flag later memory problems. Here is what the studies show, and what they can't.

Published October 2026

Short answer

Yes, modestly: faster walkers tend to score higher on thinking tests, and slow walking can flag later dementia. It is a link, not proof that walking faster makes you sharper. Evidence grade C (Limited). Large cohorts and meta-analyses, but observational, so they show a link rather than cause; downgraded once for indirectness because IQ itself rests on a few cohorts and most reviews are in older adults.

Key takeaways

• In 904 New Zealand adults aged 45, lower IQ went with slower walking, a moderate link; slow walkers also had weaker grip, poorer balance and smaller brain volume [1].
• A review of 36 studies (29,520 older adults) found walking was 0.11 m/s slower with cognitive impairment and 0.20 m/s slower with mild dementia [2].
• Slow walking plus memory complaints went with about 2.2 times the later risk of cognitive impairment and dementia across 20 studies and over 1.2 million people [3].
• Gene-based studies hint that the link runs both ways, but they are not trials [4][5].
• These are observational studies, so they show a link, not that walking faster raises IQ or sharpens the brain [1][2].

The short version

Yes, modestly. In several large studies, people who walk faster also score higher on thinking tests, and a slowing walk in later life can be an early sign of memory problems. In the Dunedin study of 904 adults aged 45, lower IQ went with slower walking, a moderate link rather than a tight one [1]. These are observational studies: they show a link, not that walking faster makes you sharper.

What the studies show

IQ and walking speed in midlife. The Dunedin study followed a New Zealand birth cohort and measured walking speed at age 45 three ways: usual pace, while doing a second task, and flat-out. Adults with lower IQ walked more slowly (a moderate association). So did people whose thinking had declined since childhood, and people who had scored poorly on tests of brain function as early as age 3. Slow walkers also had weaker grip strength, poorer balance, faster biological aging across body systems and smaller brain volume [1].

The same pattern in older adults. In a group of 97 people born in Aberdeen in 1921, slower walking went with lower childhood IQ and much lower current scores on a reasoning test [6]. In Scottish adults tested on the same intelligence test at age 11 and again at 79, better fitness (grip strength, a 6-metre walk time and lung function combined) went with healthier cognitive aging [7]. A review of 36 studies (29,520 older adults) found that walking was slower by 0.11 m/s in people with cognitive impairment, 0.20 m/s with mild dementia and 0.41 m/s with moderate dementia, compared with people whose thinking was normal [2]. A review of 26 cross-sectional studies (26,355 older adults) also found small but consistent links between better mobility and better thinking test scores [8].

Slow walking as an early warning. "Motoric cognitive risk" means slow walking plus memory complaints in someone who does not yet have dementia. Pooling 20 studies and more than 1.2 million people, one review found about 2.2 times the later risk of cognitive impairment and dementia in this group [3]. Another, of 15 cohorts, found about twice the risk of dementia [9], and a third, of five studies, put the dementia risk at about 2.8 times higher [10]. People with this pattern also had less grey matter in the premotor and prefrontal regions of the brain [11].

Young adults too. In 910 adults aged 22 to 35 from the Human Connectome Project, faster walking went with better scores on some specific thinking skills, including attention, inhibitory control and spatial orientation [12].

The nuances

• Which comes first is unclear. In 70-to-79-year-olds, declines in walking speed came before declines in verbal memory, but after adjusting for other factors the clearest link was between slowing processing speed and weakening grip [13].
• Walking reflects the body as well as the brain. In older adults, grip strength and body mass index explained more of the differences in walking speed than brain changes did, although shrinking brain volume and more white-matter damage also mattered independently [14][15].
• Genetics hints at a two-way link. Studies that use inherited gene variants to test cause and effect found that a genetically faster walking pace was linked to better thinking, and better thinking was linked to a faster walking pace [4][5]. A review of such studies found that a faster walking pace was mostly associated with better cognitive function [16]. These methods have limits and do not replace trials.
• Who was studied. The IQ findings come from a handful of cohorts in New Zealand and Scotland, and 93% of the Dunedin participants were white [1][6]. Most review findings are in older adults [2].
• Training your pace is a different question. Reviews of randomised trials find that exercise in general improves thinking and memory, even at light or moderate intensity [17]. That evidence covers exercise overall, not walking speed or IQ, so it does not show that walking faster raises IQ [18].

What this means for you

A single walking-speed number cannot tell anyone how smart they are. Researchers see walking speed as a broad sign of how well the brain and body are holding up [1]. If walking has slowed noticeably and memory worries have appeared too, it is worth mentioning to a doctor, since that combination is linked to later dementia risk [9]. For what regular walking can do, see Walking.

Go deeper

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References

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