An empirical comparison of the therapeutic benefits of physical exercise and cognitive training on the executive functions of older adults: A meta-analysis of controlled trials

Justin E. Karr, Corson N. Areshenkoff, Philippe Rast, Mauricio A. Garcia-Barrera

Research output: Contribution to journalArticlepeer-review

69 Scopus citations

Abstract

A robust body of aging-related research has established benefits of both physical exercise (PE) and cognitive training (CT) on executive functions related to the activities of daily living of older adults; however, no meta-analysis has compared these treatments. Objective: The current quantitative review involved a comparison of the overall effect sizes of PE and CT interventions on executive functions (Morris, 2008; pre-post-controlled effect size: dppc), while also exploring contextual moderators of treatment outcomes. Method: A systematic review identified 46 studies (23 PE, 21 CT, and 2 both) meeting inclusion criteria (i.e., controlled interventions, executive-related outcomes, mean ages 65+, information to calculate dppc). Results: The weighted mean dppc values came to 0.12 (p < .01) for PE and 0.24 (p < .01) for CT. Treatment effects differed based on executive constructs for CT, with problem solving presenting the highest dppc (0.47, p < .01). Notably, PE produced similar effect sizes across distinct executive functions. Treatment characteristics (e.g., session length/frequency) did not predict effect sizes. CT had a significant benefit on healthy participants (0.26, p < .01), but cognitively impaired samples did not experience a significant effect. Conclusions: Both treatments improved executive functions, but CT presented a potential advantage at improving executive functions. Improvements in executive functions differed depending on construct for CT, whereas each construct produced similar, modest effect sizes for PE. Publication bias and study quality variability potentially bias these conclusions, as lower quality studies likely produced inflated effect sizes.

Original languageEnglish
Pages (from-to)829-845
Number of pages17
JournalNeuropsychology
Volume28
Issue number6
DOIs
StatePublished - Nov 1 2014

Bibliographical note

Publisher Copyright:
© 2014 American Psychological Association.

Keywords

  • Aging
  • Cognitive training
  • Executive function
  • Meta-analysis
  • Physical exercise

ASJC Scopus subject areas

  • Neuropsychology and Physiological Psychology

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