The impact of physical activity and sex differences on intraindividual variability in inhibitory performance in older adults

TitleThe impact of physical activity and sex differences on intraindividual variability in inhibitory performance in older adults
Publication TypeJournal Article
Year of Publication2017
AuthorsFagot, D, Chicherio, C, Albinet, CT, André, N, Audiffren, M
JournalAging, Neuropsychology, and Cognition
Pagination1–23
ISSN1382-5585
Keywordsaging, inhibition, intraindividual variability, physical activity, sex differences
Abstract

It is well-known that processing speed and executive functions decline with advancing age. However, physical activity (PA) has a positive impact on cognitive performances in aging, specifically for inhibition. Less is known concerning intraindividual variability (iiV) in reaction times. This study aims to investigate the influence of PA and sex differences on iiV in inhibitory performance during aging. Healthy adults were divided into active and sedentary groups according to PA level. To analyse iiV in reaction times, individual mean, standard deviation and the ex-Gaussian parameters were considered. An interaction between activity level and sex was revealed, sedentary females being slower and more variable than sedentary men. No sex differences were found in the active groups. These results indicate that the negative impact of sedentariness on cognitive performance in older age is stronger for females. The present findings underline the need to consider sex differences in active aging approaches.

URLhttp://www.tandfonline.com/doi/abs/10.1080/13825585.2017.1372357
DOI10.1080/13825585.2017.1372357
PubMed ID28868969