The Effect of Sex and Age on Isokinetic Hip-Abduction Torques
The Effect of Sex and Age on Isokinetic Hip-Abduction Torques
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DOI：
10.1123/jsr.22.1.41
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发表时间：
2013-02-01
影响因子：
1.7
通讯作者：
Hewett, Timothy E.
中科院分区：
文献类型：
--
作者：
Brent, Jensen L.;Myer, Gregory D.;Hewett, Timothy E.
内容：由于高中女运动员的非接触性前交叉韧带（ACL）损伤率比男运动员高3-6倍，研究表明，矢状面髋关节力量在ACL损伤相关因素中发挥作用。目的：探讨性别和年龄对青年男女运动员功能性站立位髋外展肌肌力的影响。设计：前瞻性队列设计。单位：生物力学实验室。参加人员：在3年的时间内，852等速髋外展评价进行了351（272名女性，79名男性）青少年足球和篮球运动员。干预措施：在测试之前，运动员被固定在一个站立的位置，面对测力计的头部，与皮带固定从未涉及的一面和周围的腰部延伸以上的髂嵴。通过将测力计的旋转轴与髋关节旋转中心对齐，将测力计头部定位在冠状面中与身体成一直线。受试者以120度/秒的速度进行5次最大努力重复。记录峰值扭矩并将其标准化为体重。所有测试试验均由一名测试人员进行，以限制潜在的评定者间测试误差。主要观察指标：站立等速髋外展扭矩。结果：无论男性还是女性，优势侧和非优势侧的髋外展力矩均随年龄增长而增加（P <0.001）。观察到性别和年龄的显著相互作用（P <0.001），这表明随着年龄的增长，男性的峰值扭矩相对于体重的增加幅度大于女性。结论：男性表现出显着增加规范髋外展力量，而女性没有。未来的研究可能会确定，随着年龄的增长，青春期女性的相对髋关节外展力量是否没有类似的增加，这可能与其ACL损伤的风险增加有关。
Context: As high school female athletes demonstrate a rate of noncontact anterior cruciate ligament (ACL) injury 3-6 times higher than their male counterparts, research suggests that sagittal-plane hip strength plays a role in factors associated with ACL injuries. Objective: To determine if gender or age affect hip-abductor strength in a functional standing position in young female and male athletes. Design: Prospective cohort design. Setting: Biomechanical laboratory. Participants: Over a 3-y time period, 852 isokinetic hip-abduction evaluations were conducted on 351 (272 female, 79 male) adolescent soccer and basketball players. Intervention: Before testing, athletes were secured in a standing position, facing the dynamometer head, with a strap secured from the uninvolved side and extending around the waist just above the iliac crest. The dynamometer head was positioned in line with the body in the coronal plane by aligning the axis of rotation of the dynamometer with the center of hip rotation. Subjects performed 5 maximum-effort repetitions at a speed of 120 degrees/s. The peak torque was recorded and normalized to body mass. All test trials were conducted by a single tester to limit potential interrater test error. Main Outcome Measure: Standing isokinetic hip-abduction torque. Results: Hip-abduction torque increased in both males and females with age (P < .001) on both the dominant and nondominant sides. A significant interaction of gender and age was observed (P < .001), which indicated that males experienced greater increases in peak torque relative to body weight than did females as they matured. Conclusions: Males exhibit a significant increase in normative hip-abduction strength, while females do not. Future study may determine if the absence of similar increased relative hip-abduction strength in adolescent females, as they age, may be related to their increased risk of ACL injury compared with males.