La Trobe Sport and Exercise Medicine Research Center, School of Allied Health, La Trobe University, Melbourne, Victoria, Australia.
Center for Sport Research, School of Exercise and Nutrition Sciences, Deakin University, Burwood, Victoria, Australia.
J Strength Cond Res. 2019 Dec;33(12):3374-3383. doi: 10.1519/JSC.0000000000003023.
Gastin, PB, Hunkin, SL, Fahrner, B, and Robertson, S. Deceleration, acceleration, and impacts are strong contributors to muscle damage in professional Australian football. J Strength Cond Res 33(12): 3374-3383, 2019-The purpose of this study was to investigate the relationships between serum creatine kinase [CK], an indirect marker of muscle damage, and specific indices of match load in elite Australian football. Twenty-six professional players were assessed during a competitive Australian Football League (AFL) season. [CK] was collected 24-36 hours before match and 34-40 hours after match during 8 in-season rounds. An athlete-tracking technology was used to quantify match load. Generalized estimating equations and random forest models were constructed to determine the extent to which match-load indices and pre-match [CK] explained post-match [CK]. There was a 129 ± 152% increase in [CK] in response to AFL competition. Generalized estimating equations found that number of impacts >3g (p = 0.004) and game time (p = 0.016) were most strongly associated with post-match [CK]. Random forest, with considerably lower errors (130 vs. 316 U·L), found deceleration, acceleration, impacts >3g, and sprint distance to be the strongest predictors. Pre-match [CK] accounted for 11% of post-match [CK], and considerable interindividual and intraindividual variability existed in the data. Creatine kinase, an indicator of muscle damage, was considerably elevated as a result of AFL competition. Parametric and machine-learning analysis techniques found several indices of physical load associated with muscle damage during competition, with impacts >3g and high-intensity running variables as the strongest predictors. [CK] may be used as a global measure of muscle damage in field team sports such as AF, yet with some caution given cost, invasiveness, and inherent variability. Quantifying physical load and the responses to that load can guide athlete management decision-making and is best undertaken within a suite of practical, sport-specific measures, where data are interpreted individually and with an understanding of the limitations.
加斯汀、Hunkin、法纳、罗伯逊。减速、加速和撞击是导致职业澳式足球运动员肌肉损伤的主要原因。《力量与条件研究杂志》33 卷 12 期，3374-3383 页，2019 年。本研究旨在调查精英澳式足球运动员血清肌酸激酶（CK），一种肌肉损伤的间接标志物，与特定比赛负荷指标之间的关系。26 名职业球员在澳大利亚足球联赛（AFL）赛季中进行了评估。在 8 个常规赛轮次中，在赛前 24-36 小时和赛后 34-40 小时采集 CK。使用运动员追踪技术来量化比赛负荷。构建了广义估计方程和随机森林模型，以确定比赛负荷指标和赛前 CK 解释赛后 CK 的程度。AFL 比赛后 CK 增加了 129±152%。广义估计方程发现，撞击次数>3g（p=0.004）和比赛时间（p=0.016）与赛后 CK 关系最密切。随机森林模型（误差为 130 比 316 U·L）发现，减速、加速、撞击次数>3g 和冲刺距离是最强的预测因素。赛前 CK 占赛后 CK 的 11%，数据存在很大的个体内和个体间变异性。肌酸激酶是肌肉损伤的指标，AFL 比赛后显著升高。参数和机器学习分析技术发现，比赛中与肌肉损伤相关的物理负荷的几个指标，其中撞击次数>3g 和高强度跑动变量是最强的预测因素。CK 可作为 AFL 等野外团队运动中肌肉损伤的整体衡量指标，但要谨慎使用，因为 CK 成本高、侵入性强且固有变异性大。量化物理负荷及其对负荷的反应可以指导运动员管理决策，最好在一套实用的、特定于运动的测量方法中进行，在这些方法中，数据是个体解释的，并且了解其局限性。
