Bauermeister, S and Bunce, D (2016) Aerobic Fitness and Intraindividual Reaction Time Variability in Middle and Old Age. The journals of gerontology. Series B, Psychological sciences and social sciences, 71 (3). pp. 431-438. ISSN 1079-5014
Abstract
Objective: To examine whether aerobic fitness moderated age differences in within-person reaction time variability (WP RT variability) and given conceptual linkage involving the frontal cortex, whether effects were mediated by executive function. Method: Aerobic fitness (estimated VO2max) and WP RT variability were investigated in 225 healthy, community-dwelling adults aged 50-90 years (M = 63.83) across 4 cognitive domains; psychomotor performance, executive function, visual search, and recognition. Results: Significant Age × Aerobic fitness interactions were found in relation to WP variability in 3 cognitive domains: psychomotor performance (4-choice RT), executive function (Flanker and Stroop arrows), and immediate recognition. Lower aerobic fitness was associated with greater RT variability, and this effect increased with age. Additionally, some of these effects were mediated by executive function. Discussion: The findings suggest that aerobic fitness moderated the association between age and intraindividual RT variability, and that executive function selectively mediated that association. It is possible that aerobic fitness helps attenuate the neurobiological decline that contributes to cognitive deficits in old age and that WP variability is a measure that may be particularly sensitive to this effect.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | This is a pre-copyedited, author-produced PDF of an article accepted for publication in The journals of gerontology following peer review. The version of record Bauermeister, S and Bunce, D (2014) Aerobic Fitness and Intraindividual Reaction Time Variability in Middle and Old Age. The journals of gerontology. Series B, Psychological sciences and social sciences. is available online at: http://dx.doi.org/10.1093/geronb/gbu152 |
Keywords: | Age; Aerobic fitness; Cognitive function; Intraindividual variability; Physical activity; Reaction time |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Medicine and Health (Leeds) > School of Psychology (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 18 May 2015 11:45 |
Last Modified: | 08 May 2016 16:36 |
Published Version: | http://dx.doi.org/10.1093/geronb/gbu152 |
Status: | Published |
Publisher: | Oxford University Press |
Refereed: | Yes |
Identification Number: | 10.1093/geronb/gbu152 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:84477 |