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Physical activity, cognitive decline, and risk of dementia: 28 year follow-up of Whitehall II cohort study

BMJ 2017; 357 doi: https://doi.org/10.1136/bmj.j2709 (Published 22 June 2017) Cite this as: BMJ 2017;357:j2709

Rapid Response:

Re: Physical activity, cognitive decline, and risk of dementia: 28 year follow-up of Whitehall II cohort study

If we are to be honest, we would probably agree that confirmation bias is a universal human failing, even amongst skeptics like myself. So I was delighted by the conclusions of the article by Sabia et al.[1]

I have eschewed exercise most of my 81 years, following the dictum attributed to Oscar Wilde, “When I think of exercise, I lie down until the thought goes away”.

I promptly conveyed the substance of the article to a friend whose husband, much younger than I, is now severely demented. Her comment was that he had, indeed, exercised almost every morning, but had, with the onset of his dementia, reduced, and finally ceased, his exercise.

I have previously contributed my self-exculpatory thoughts [2] – to the chagrin of many BMJ rapid responders. Forgive me then, my schadenfreude on reading Sabia’s conclusions.

I consider myself simply lucky to have inherited the appropriate genes – parents living to 87 and 93 with no sign of dementia.

1. BMJ 2017;357:j2709 http://dx.doi.org/10.1136/bmj.j2709
2. Why running is not for people. BMJ 2003;327:1476

Competing interests: No competing interests

28 June 2017
Peter C Arnold
Retired GP
N/A
PO Box 280, Edgecliff, New South Wales 2027, Australia