Beyond muscles: Investigating immuno-regulatory myokines in acute resistance exercise - A systematic review and meta-analysis

Miriam Ringleb, Florian Javelle, Simon Haunhorst, Wilhelm Bloch, Lena Fennen, Sabine Baumgart, Sebastian Drube, Philipp Reuken, Mathias Pletz, Heiko Wagner, Holger W Gabriel, Christian Puta

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Abstract

Myokines, released from the muscle, enable communication between the working muscles and other tissues. Their release during physical exercise is assumed to depend on immune–hormonal–metabolic interactions concerning mode (endurance or resistance exercise), duration, and intensity. This meta-analysis aims to examine the acute changes of circulating myokines inducing immunoregulatory effects caused by a bout of resistance exercise and to consider potential moderators of the results. Based on this selection strategy, a systematic literature search was conducted for resistance exercise intervention studies measuring interleukin (IL-) 6, IL-10, IL-1ra, tumor necrosis factor (TNF-) α, IL-15, IL-7, transforming growth factor (TGF-) β1, and fractalkines (FKN) before and immediately after resistance exercise in healthy individuals. Random-effects meta-analysis was performed for each myokine. We identified a moderate positive effect of resistance exercise for IL-6 and IL-1ra. Regarding IL-15 and TNF-α, small to moderate effects were found. For IL-10, no significant effect was observed. Due to no data, meta-analyses for IL-7, TGF-β1, and FKN could not be performed. No moderators (training status, type of exercise, risk of bias, age, sex, time of day, exercise volume, exercise intensity, exercise dose) of the results were detected for all tested myokines. Taken together, this systematic review and meta-analysis showed immediate positive effects of an acute resistance exercise session on IL-6, IL-1ra, TNF-α, and IL-15 levels.
Original languageEnglish
JournalFASEB journal : official publication of the Federation of American Societies for Experimental Biology
Volume38
Issue number7
DOIs
Publication statusPublished - 10.04.2024

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