Can Intraindividual Variability in Cognitive Speed Be Reduced by Physical Exercise? Results From the LIFE Study

The Journals of Gerontology. Series B, Psychological Sciences and Social Sciences
Allison A M Bielak, Christopher R Brydges

Abstract

Findings are mixed regarding the potential to improve older adults' cognitive ability via training and activity interventions. One novel sensitive outcome may be intraindividual variability (IIV) in cognitive speed, or moment-to-moment changes in a person's performance. The present article evaluated if participants who participated in a moderate physical activity intervention showed a reduction in IIV, compared with a successful aging education control group. For approximately 2.6 years, sedentary adults aged 70-90 years participated in the Lifestyle Interventions and Independence for Elders (LIFE) Study (n = 1,635), a multisite Phase 3 randomized controlled trial to reduce major mobility disability. They completed 4 reaction time tests at baseline and at approximately 24 months post-test. Analyses were conducted following both the intent-to-treat principle and complier average casual effect modeling. Results indicated that participants in the physical activity group did not show a reduction in their IIV. The lack of a significant reduction in IIV may be due to the mild nature of the physical activity program and the cognitively healthy sample. It is also possible that other types of lifestyle activity interventions (e.g., soci...Continue Reading

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Citations

Jan 18, 2020·The Journals of Gerontology. Series B, Psychological Sciences and Social Sciences·Christopher R BrydgesAllison A M Bielak
Oct 5, 2019·The Journals of Gerontology. Series B, Psychological Sciences and Social Sciences·Janelle N Beadle
Aug 11, 2020·Journal of Cognitive Enhancement·Christopher R Brydges, Allison A M Bielak
Apr 4, 2021·International Journal of Environmental Research and Public Health·Juan Antonio Párraga-MontillaPedro Ángel Latorre-Román
Dec 6, 2021·The Journals of Gerontology. Series B, Psychological Sciences and Social Sciences·Tudor VrinceanuLouis Bherer

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