The influence of gender on knee kinematics, kinetics and muscle activation patterns during side-step cutting
The influence of gender on knee kinematics, kinetics and muscle activation patterns during side-step cutting
复制标题
DOI：
10.1016/j.clinbiomech.2005.08.001
复制
发表时间：
2006-01-01
影响因子：
1.8
通讯作者：
Powers, CM
中科院分区：
文献类型：
--
作者：
Sigward, SM;Powers, CM
研究背景：有研究表明，运动动作的性别差异是女性运动员非接触性前交叉韧带损伤发病率不成比例的一个因素。本研究的目的是评估性别差异，膝关节的运动学，动力学和肌肉激活过程中的侧步切割。对30名健康大学生足球运动员（男15名，女15名）在侧步切入的早期减速阶段的三维运动学、地面反作用力（2400 Hz）和肌电活动（表面电极）进行了记录。单尾t检验评估膝关节运动学、峰值力矩、净关节力矩脉冲和平均肌肉肌电图强度的性别差异。然而，与男性相比，女性在减速早期表现出较小的峰值膝屈肌力矩（1.4（0.8）vs. 2.1（0.8）N m/kg，P = 0.05）和较大的膝内收肌力矩（0.43（0.5）vs. 0.01（0.3）N m/kg，P < 0.01）。此外，女性股四头肌平均肌电强度高于男性（191% vs. 151%最大自主等长收缩，P = 0.02）。在一般情况下，女性经历了增加额状面力矩和减少矢状面力矩在早期减速。这些差异表明膝关节的额状面支撑主要由被动结构（包括前交叉韧带）提供的“风险”模式。此外，增加的四头肌活动和较小的净屈肌力矩可能表明矢状面保护较少（即，胫骨向前平移的趋势增加）。(c)2005爱思唯尔有限公司保留所有权利。
Background It has been suggested that gender differences in the performance of athletic maneuvers is a contributory factor with respect to the disproportionate incidence of non-contact anterior cruciate ligament injury in female athletes. The purpose of this study was to evaluate gender differences in knee joint kinematics, kinetics and muscle activation during a side-step cutting.Methods. Three-dimensional kinematics, ground reaction forces (2400 Hz) and electromyographic activity (surface electrodes) were recorded during the early deceleration phase of side-step cutting in 30 healthy collegiate soccer players (15 male, 15 female). Gender differences in knee joint kinematics, peak moments, net joint moment impulse and average muscle EMG intensity were evaluated with one-tailed t-tests.Findings. No differences in kinematics were found. However, when compared to males, females demonstrated a smaller peak knee flexor moment (1.4 (0.8) vs. 2.1 (0.8) N m/kg, P = 0.05) and a greater knee adductor moment (0.43 (0.5) vs. 0.01 (0.3) N m/kg, P < 0.01) during early deceleration. In addition, females displayed greater average quadriceps EMG intensity than males (191% vs. 151% maximum voluntary isometric contraction, P = 0.02).Interpretation. In general, females experienced increased frontal plane moments and decreased sagittal plane moments during early deceleration. These differences are suggestive of an "at risk" pattern in that frontal plane support of the knee is afforded primarily by passive structures (including the anterior cruciate ligament). Furthermore, increased quadriceps activity and smaller net flexor moments may suggest less sagittal plane protection (i.e., increased tendency towards anterior tibial translation). (c) 2005 Elsevier Ltd. All rights reserved.