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Free-living physical activity and executive function: A multi-study analysis of age groups and times of day
Anne Eppinger-Ruiz de Zarate1,2,3, Daniel Powell4,5, Jan Kühnhausen6,2,3
1Department of Psychology, University of Tuebingen, Tuebingen, Germany.
Background:
Executive Function (EF) is a potential mechanism linking physical activity (PA) and mental health. However, evidence regarding the association between free-living PA and EF is limited with mixed results. Across two studies, we examined associations between accelerometer-assessed moderate-to-vigorous PA (MVPA) and facets of EF in different age groups (Study 1) and at different times of day (Study 2).
Method:
In Study 1, we tested the association between MVPA and verbal fluency across seven days in 285 participants (children, adults, older adults). In Study 2, we tested between- and within-person associations between MVPA and working memory (afternoon, evening, next morning) across three 18-day bursts in 64 preadolescents.
Results:
Study 1 showed no association between MVPA and verbal fluency overall, but there was an interaction by age group: a positive association was evident in older adults only. In Study 2, we observed a positive between-person association between MVPA and subsequent afternoon and next morning working memory, but not within-person. In the evening, MVPA was not related to working memory.
Conclusions:
The association between free-living PA and EF differs between age groups and times of day. Future research should consider these factors when examining the association and its role for mental health.
