Ryningen Anita, Rostad Kari, Ersvær Elisabeth, Sjøholt Gry, Paulsen Gøran, Gundersen Hilde, Kristoffersen Morten, Bjørkhaug Lise
Department of Safety, Chemistry and Biomedical Laboratory Sciences, Western Norway University of Applied Sciences, Bergen, Norway.
Department of Biotechnology, Inland Norway University of Applied Sciences, Lillehammer, Norway.
Front Physiol. 2024 Mar 12;15:1365357. doi: 10.3389/fphys.2024.1365357. eCollection 2024.
Heavy strength (HS) and short-sprint (SS) are commonly used training methods for competitive road cyclists, with the aim to improve the anaerobic power and short time cycling performance. Knowledge of how such training methods affects biochemical as well as molecular factors, are particularly important for determining individual recovery and long-term adaptations. The primary aim of the current study was to investigate the expression levels of small non-coding RNAs in response to HS and SS training in elite cyclists as potential biomarkers for individual optimal restitution time. Eleven well trained cyclists performed one session of HS training and one session of SS training on separate days. Blood samples were taken at baseline and 5 min, 1 h and 21 h post training. Along with physiological measurements and biochemical factors (serum creatine kinase, myoglobin, human growth hormone and plasma lactate), real-time quantitative PCR was used to explore whether HS and/or SS training influenced the abundance of 24 circulating miRNAs, in serum, associated with muscle development, angiogenesis, and/or inflammation. Based on complete miRNA profiles from nine cyclists, the miRNAs showing most altered expression after both training sessions included the three striated muscle-specific miRNAs (myomiRs) miR-1-3p, 133a-3p and 133b-3p. While all three miRNAs showed significantly highest expression at 1 h post HS session, the acute effect of the SS session included a significantly higher level of miR-1-3p alone, at 5 min (highest), as well as at 1 h and 21 h post session. Correlation (negative) with biochemical markers was only shown for miR-133a-3p and CK (r = -0.786, = 0.041) and between miR-133b-3p and [La] (r = -0.711, = .032), at 21 h post SS session. Our findings support that unique myomiRs are regulated by HS and SS training. Such knowledge may be important for individually adjusted restitution times.
高强度(HS)和短距离冲刺(SS)是竞技公路自行车运动员常用的训练方法,旨在提高无氧功率和短时间骑行表现。了解这些训练方法如何影响生化以及分子因素,对于确定个体恢复情况和长期适应性尤为重要。本研究的主要目的是调查精英自行车运动员在进行HS和SS训练后,作为个体最佳恢复时间潜在生物标志物的小非编码RNA的表达水平。11名训练有素的自行车运动员在不同日期分别进行了一次HS训练和一次SS训练。在基线以及训练后5分钟、1小时和21小时采集血样。除了进行生理测量和生化因素检测(血清肌酸激酶、肌红蛋白、人类生长激素和血浆乳酸)外,还使用实时定量PCR来探究HS和/或SS训练是否影响血清中与肌肉发育、血管生成和/或炎症相关的24种循环微小RNA(miRNA)的丰度。基于9名自行车运动员完整的miRNA谱,在两次训练后表达变化最大的miRNA包括三种横纹肌特异性miRNA(肌miR)miR-1-3p、133a-3p和133b-3p。虽然这三种miRNA在HS训练后1小时均显示出显著最高表达,但SS训练的急性效应包括仅miR-1-3p在训练后5分钟(最高)以及训练后1小时和21小时有显著更高水平。在SS训练后21小时,仅miR-133a-3p与生化标志物肌酸激酶(CK)呈负相关(r = -0.786,P = 0.041),miR-133b-3p与血浆乳酸浓度[La]呈负相关(r = -0.711,P = 0.032)。我们的研究结果支持独特的肌miR受HS和SS训练调控。这些知识对于个性化调整恢复时间可能很重要。