Sprint Interval Training Decreases Circulating MicroRNAs Important for Muscle Development

Denham, Joshua ORCID: https://orcid.org/0000-0001-5804-4960 and Gray, Adrian and Scott-Hamilton, John and Hagstrom, Amanda D. (2018) Sprint Interval Training Decreases Circulating MicroRNAs Important for Muscle Development. International Journal of Sports Medicine, 39 (1). pp. 67-72. ISSN 0172-4622


Small non-coding RNAs, such as microRNAs (miRNAs), have emerged as powerful post-transcriptional regulators of gene expression that play important roles in many developmental and biological processes. In this study, we assessed the abundance of circulating microRNAs important for skeletal muscle and heart adaptations to exercise (miR-1, miR-133a, miR-133b and miR-486), following acute exercise and short-term sprint interval training (SIT). Twenty-eight individuals completed four all-out efforts on a cycle ergometer, and donated blood before and 30 min after the cessation of exercise. A subset of 10 untrained men completed 4-6 efforts of SIT, three times a week for 6 weeks, and donated resting blood samples before and after the intervention. MiRNA TaqMan qPCR was performed and whilst no changes were observed after a single session of SIT (all p>0.05), the 6-wk SIT intervention significantly reduced the whole blood content of all four miRNAs (mean fold-changes: 0.37-0.48, all p<0.01). Our data suggests that circulating miRNAs are responsive to short-term SIT and could have roles in SIT-induced health and performance adaptations. Further work is required to establish whether circulating miRNAs could serve as biomarkers for predicting exercise training responses and monitoring exercise interventions.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 14 Dec 2021 03:11
Last Modified: 15 Dec 2021 03:07
Uncontrolled Keywords: cardiorespiratory fitness; epigenetics; exercise; HIIT; myomiR; non-coding RNA
Fields of Research (2008): 06 Biological Sciences > 0604 Genetics > 060499 Genetics not elsewhere classified
11 Medical and Health Sciences > 1106 Human Movement and Sports Science > 110602 Exercise Physiology
Fields of Research (2020): 31 BIOLOGICAL SCIENCES > 3105 Genetics > 310599 Genetics not elsewhere classified
42 HEALTH SCIENCES > 4207 Sports science and exercise > 420702 Exercise physiology
Identification Number or DOI: https://doi.org/10.1055/s-0043-120763
URI: http://eprints.usq.edu.au/id/eprint/43628

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