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Habitual exercise affects inhibitory processing in young and middle age men and women

Lennox, K, Miller, RK and Martin, FH 2019 , 'Habitual exercise affects inhibitory processing in young and middle age men and women' , International Journal of Psychophysiology, vol. 146 , pp. 73-84 , doi: 10.1016/j.ijpsycho.2019.08.014.

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Inhibitory processing is an aspect of cognitive control susceptible to cognitive decline due to aging. Engaging inhabitual exercise could attenuate these declines in middle age. In the present study, the event-related potential(ERP) activity of 40 middle age adults (21 females) and 42 young adults (24 females) was recorded withelectroencephalography (EEG) as participants completed two cognitive tasks that elicit inhibitory processing,one indexing interference control (i.e., the Flanker Task), and the other response inhibition (i.e., the Stop-Signaltask). Congruent arrays elicited significantly earlier peaks in P3b activity compared to incongruent arrays in theFlanker task for non-exercisers and young habitual exercisers. For middle age habitual exercisers, this differencewas of much smaller magnitude, and non-significant. This finding suggests that the timing of interferencecontrol, as indexed by P3b latency, was similar in the congruent and congruent conditions for middle age adultswho engaged in regular exercise. On the Stop-Signal task, the P3b activity of habitual exercisers was larger andpeaked earlier than that of non-exercisers, indicating that ERP activity signalling response inhibition was enhanced in young and middle age adult regular exercisers. Sex differences were also observed in peak P3b activityon the Flanker task, results which suggest the relationship between regular exercise and interference controldiffers between men and women. The findings of this study suggest that it is important to consider individualdifferences, for example sex, when examining the effectiveness of exercise interventions targeting cognitivedecline.

Item Type: Article
Authors/Creators:Lennox, K and Miller, RK and Martin, FH
Keywords: habitual exercise, inhibition, middle age, P3b, N2
Journal or Publication Title: International Journal of Psychophysiology
Publisher: Elsevier BV
ISSN: 0167-8760
DOI / ID Number: 10.1016/j.ijpsycho.2019.08.014
Copyright Information:

© 2019 Elsevier B.V. All rights reserved.

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