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Published on: March 7, 2019
Objectively measured physical activity profile and cognition in Finnish elderly twins
Paula Iso-Markku1, Katja Waller2, Eero Vuoksimaa3,4
1Department of Clinical Physiology and Nuclear Medicine, HUS Medical Imaging Center, Helsinki University Central Hospital and University of Helsinki, Helsinki, Finland.
Introduction:
We studied whether objectively measured physical activity (PA) and sedentary behavior (SB) are associated with cognition in Finnish elderly twins.
Methods:
This cross-sectional study comprised twins born in Finland from 1940 to 1944 in the Older Finnish Twin Cohort (mean age, 72.9 years; 726 persons). From 2014 to 2016, cognition was assessed with a validated telephonic interview, whereas PA was measured with a waist-worn accelerometer.
Results:
In between-family models, SB and light physical activity had significant linear associations with cognition after adjusting for age, sex, wearing time, education level, body mass index, and living condition (SB: β-estimate, -0.21 [95% confidence intervals, -0.42 to -0.003]; light physical activity: β-estimate, 0.30 [95% confidence intervals, 0.02-0.58]). In within-family models, there were no significant linear associations between objectively measured PA and cognition.
Discussion:
Objectively measured light physical activity and SB are associated with cognition in Finnish twins in their seventies, but the associations were attributable to genetic and environmental selection.
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