Strong cardiovascular health decades before old age has been linked with an 88% lower chance of developing dementia, and walking for as few as 3,800 steps a day can decrease risk compared to non-walkers, too.

But new research suggests walking could be particularly effective for those who carry the APOE4 gene, which is associated with an increased likelihood of getting the condition.

One of two studies to be shown at the Alzheimer’s Association International Conference meeting in Toronto today looked at the effects of walking on 2,985 older adults.

All were tested for their APOE status; it seemed likely that those more liable to developing dementia may see increased protection from walking than others, building on existing research suggesting that exercise may delay the onset of t

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