Tan, J, Shi, X, Witchalls, J, Waddington, G, Lun Fu, AC, Wu, S, Tirosh, O, Wu, X, and Han, J. Effects of pre-exercise acute vibration training on symptoms of exercise-induced muscle damage: a systematic review and meta-analysis. J Strength Cond Res XX(X): 000-000, 2020-Exercise-induced muscle damage (EIMD) normally occurs after unaccustomed high-intensity eccentric exercises. Symptoms of EIMD include delayed-onset muscle soreness (DOMS), tenderness, stiffness, swelling, reduced strength, and increased creatine kinase (CK) levels in the blood. Vibration training (VT) may be useful as a pre-exercise intervention in attenuating EIMD on the basis of tonic vibration reflex (TVR) through a more efficient distribution of contractile stress over muscle fibers. The objective of this meta-analysis is to examine the effects of acute VT on symptoms of EIMD when performed as the pre-exercise intervention. Randomized controlled trials (RCTs) published in the 8 databases of Cochrane Library, PubMed, Embase, Web of Science, EBSCO, China National Knowledge Infrastructure, Airiti Library and WanFang Data from 1966 (the earliest available time) to January 2019 were searched. A total of 2,324 records were identified and 448 articles were screened with the title and abstract. Two investigators identified eligible studies, extracted data, and assessed the risk of bias independently. Review Manager 5.3 designed by Cochrane was used for the current meta-analysis. Six RCTs involving 180 subjects were included in the analysis. A low-to-moderate methodological quality of the included studies was revealed using the physiotherapy evidence database scale. The results showed that acute VT was superior to the control group for the reduction of DOMS on pain visual analogue scale at 24, 48 hours and pressure pain threshold at 24 hours. In addition, superior effects of acute VT were also found on the indirect markers of muscle damage including CK at 24, 72 hours, and lactate dehydrogenase at 24 hours. The current meta-analysis has collated the evidence to demonstrate that receiving acute VT before unaccustomed high-intensity eccentric exercises may be effective in attenuating markers of muscle damage and the development of DOMS when compared with a control group. The possible mechanisms of this effect could be attributed to an improved synchronization of muscle fiber caused by TVR, which could result in even distribution of exterior loads and eventually attenuate disruptions of muscle fibers. In addition, increased blood flow may also be helpful to prevent accumulation of metabolic substances and attenuate subsequent symptoms of EIMD. Vibration training may be used as a pre-exercise intervention to alleviate symptoms of EIMD caused by unaccustomed high-intensity eccentric exercise. Because of the limited quantity and quality of included studies, more high-quality studies are required to ascertain the effect of VT on symptoms of EIMD.

译文

:Tan,J,Shi,X,Witchalls,J,Waddington,G,Lun Fu,AC,Wu,S,Tirosh,O,Wu,X,and Han,J.运动前急性振动训练对以下症状的影响运动引起的肌肉损伤:系统评价和荟萃分析。 J Strength Cond Res XX(X):000-000,2020年。运动引起的肌肉损伤(EIMD)通常在不习惯的高强度离心运动之后发生。 EIMD的症状包括血液中延迟发作的肌肉酸痛(DOMS),压痛,僵硬,肿胀,强度降低和肌酸激酶(CK)水平升高。振动训练(VT)可以作为锻炼前的干预手段,它可以通过在肌肉纤维上更有效地分布收缩应力,在强直振动反射(TVR)的基础上衰减EIMD。这项荟萃分析的目的是检查作为运动前干预措施时急性室速对EIMD症状的影响。检索了Cochrane图书馆,PubMed,Embase,Web of Science,EBSCO,中国国家知识基础设施,Airiti图书馆和WanFang Data的8个数据库中公布的1966年(最早可用时间)至2019年1月的随机对照试验(RCT)。总共确定了2,324条记录,并筛选了448条带有标题和摘要的文章。两名研究人员确定了合格的研究,提取了数据,并独立评估了偏倚的风险。当前的荟萃分析使用了Cochrane设计的Review Manager 5.3。分析中包括涉及180个受试者的6个RCT。使用理疗证据数据库量表显示纳入研究的方法学质量为中度至中度。结果显示,在24、48小时疼痛视觉模拟量表和24小时压力疼痛阈值方面,急性VT优于对照组。此外,还发现急性VT对肌肉损伤的间接标志物有更好的作用,包括24、72小时的CK和24小时的乳酸脱氢酶。当前的荟萃分析整理了证据,表明与对照组相比,在不习惯的高强度离心运动之前接受急性VT可能有效减轻肌肉损伤和DOMS的发展。这种作用的可能机制可以归因于TVR引起的肌肉纤维改善的同步性,这可以导致外部负荷的均匀分布并最终减弱肌肉纤维的破坏。此外,增加血流量也可能有助于防止代谢物质的积累并减轻随后的EIMD症状。振动训练可用作运动前干预,以缓解因不习惯的高强度离心运动引起的EIMD症状。由于纳入研究的数量和质量有限,因此需要更多高质量的研究来确定VT对EIMD症状的影响。

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