Post-match changes in neuromuscular function and the relationship to match demands in amateur rugby league matches
Post-match changes in neuromuscular function and the relationship to match demands in amateur rugby league matches
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DOI：
10.1016/j.jsams.2011.10.003
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发表时间：
2012-05-01
影响因子：
4
通讯作者：
Skein, Melissa
中科院分区：
文献类型：
--
作者：
Duffield, Rob;Murphy, Alistair;Skein, Melissa
目的：本研究调查了竞技性橄榄球联盟比赛后神经肌肉收缩特性的变化以及与体能比赛要求的关系。设计：11 名训练有素的男性橄榄球联盟运动员参加 2-3 场业余竞技性比赛（n=30）。方法：赛前、赛前（15 分钟内）和赛后 2 小时，运动员进行重复的反向运动跳跃 (CMJ)，然后对右膝伸肌进行最大自主收缩的等长测试(MVC)、随意激活 (VA) 和峰值抽搐力 (Pt) 的诱发抽搐收缩特性、扭矩发展速率 (RTD)、收缩持续时间 (CD) 和松弛率 (RR)。每场比赛中，球员佩戴1Hz全球定位卫星设备记录比赛距离和速度。此外，还对比赛进行录像并对全身碰撞次数进行符号分析。结果：总距离、高强度、极高强度距离和平均速度分别为 5585 +/- 1078 m、661 +/- 265、216 +/- 121 m 和 75 +/- 14 m min(-1)。 MVC 立即和赛后 2 小时较赛前显着降低 8 +/- 11 和 12 +/- 13% (p < 0.05)。此外，抽搐收缩特性表明赛后 Pt、RTD 和 RR 受到抑制（p < 0.05）。然而，VA 与赛前 (90 +/- 9%)、赛后即刻 (89 +/- 9%) 或赛后 2 小时 (89 +/- 8%) 相比没有显着变化 (p > 0.05)。相关分析表明，总比赛时间（r=-0.50）和平均速度（r=-0.40）与赛后MVC的变化呈中度相关，而平均速度（r=0.35）与VA呈中度相关。 结论：本研究强调了业余橄榄球联赛的身体需求导致外周收缩功能中断，赛后自愿扭矩抑制可能与比赛时间和平均速度相关。 (C) 2011 年澳大利亚运动医学。由爱思唯尔有限公司出版。保留所有权利。
Objectives: The current study investigated the change in neuromuscular contractile properties following competitive rugby league matches and the relationship with physical match demands.Design: Eleven trained, male rugby league players participated in 2-3 amateur, competitive matches (n=30).Methods: Prior to, immediately (within 15-min) and 2 h post-match, players performed repeated counter-movement jumps (CMJ) followed by isometric tests on the right knee extensors for maximal voluntary contraction (MVC), voluntary activation (VA) and evoked twitch contractile properties of peak twitch force (Pt), rate of torque development (RTD), contraction duration (CD) and relaxation rate (RR). During each match, players wore 1 Hz Global Positioning Satellite devices to record distance and speeds of matches. Further, matches were filmed and underwent notational analysis for number of total body collisions.Results: Total, high-intensity, very-high intensity distances covered and mean speed were 5585 +/- 1078 m, 661 +/- 265, 216 +/- 121 m and 75 +/- 14 m min(-1), respectively. MVC was significantly reduced immediately and 2 h post-match by 8 +/- 11 and 12 +/- 13% from pre-match (p < 0.05). Moreover, twitch contractile properties indicated a suppression of Pt, RTD and RR immediately post-match (p < 0.05). However, VA was not significantly altered from pre-match (90 +/- 9%), immediately-post (89 +/- 9%) or 2 h post (89 +/- 8%), (p > 0.05). Correlation analyses indicated that total playing time (r=-0.50) and mean speed (r=-0.40) were moderately associated to the change in post-match MVC, while mean speed (r=0.35) was moderately associated to VA.Conclusions: The present study highlights the physical demands of competitive amateur rugby league result in interruption of peripheral contractile function, and post-match voluntary torque suppression may be associated with match playing time and mean speeds. (C) 2011 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.