Dynamic Valgus Alignment and Functional Strength in Males and Females During Maturation
Dynamic Valgus Alignment and Functional Strength in Males and Females During Maturation
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DOI：
10.4085/1062-6050-44.1.26
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发表时间：
2009-01-01
影响因子：
3.3
通讯作者：
Nguyen, Anh-Dung
中科院分区：
文献类型：
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作者：
Schmitz, Randy J.;Shultz, Sandra J.;Nguyen, Anh-Dung
背景：生理成熟人群中动态测量的性别差异已经确立。获得成熟度对涉及伤害风险的动态性能测量的影响的信息可能使我们能够更好地设计伤害预防方案。目的：探讨男性和女性在动态外翻对准和三跳距离测量上的性别差异。第二个目的是确定强度和功率的现场测试是否预测动态外翻对准。设计：横断面研究。设置:实验室。患者或其他参与者：157名9 - 18岁的年轻运动员（78名女性，79名男性）。干预措施：作为更广泛的损伤筛查的一部分，受试者进行了落跳着陆和单腿三跳测试。主要结果测量：通过自我报告问卷确定成熟状态，并根据Tanner阶段1和2 (MatGrp1)， 3和4 （MatGrp2）和5 （MatGrp3）进行分组。前平面膝关节外翻位移，作为测量动态外翻对齐，和单腿三跳距离进行评估。结果：雄性在成熟后期的跳降过程中动态外翻定位较少（MatGrp1 = 13.1度+/- 8.7度，MatGrp2 = 9.0度+/- 6.2度，MatGrp3 = 9.2度+/- 9.4度），而雌性在整个成熟过程中动态外翻定位增加（MatGrp1 = 11.5度+/- 6.9度，MatGrp2 = 12.8度+/- 8.8度，MatGrp3 = 15.5度+/- 8.7度）。因此，在更成熟的群体中，雄性比雌性有更少的动态外翻对齐。雄性（MatGrp1 = 393.5 +/- 63.7 cm, MatGrp2 = 491.8 +/- 95.1 cm, MatGrp3 = 559.3 +/- 76.3 cm）和雌性（MatGrp1 = 360.3 +/- 37.1 cm, MatGrp2 = 380.1 +/- 44.3 cm, MatGrp3 = 440.0 +/- 66.2 cm）均增加了三跳距离，但雄性增加较多。在MatGrp和性别的各个亚群中，三跳距离对动态失调没有预测能力。结论：当评估动态外翻对准和力量时，性别和成熟状态显示出相互作用。然而，功能强度并不能预测动态外翻对齐的程度。
Context: Sex differences in dynamic measures have been established in physically mature populations. Gaining information on maturation's effect on dynamic performance measures implicated in injury risk may enable us to better design injury prevention programs.Objective: To examine sex differences in dynamic valgus alignment and triple-hop distance measures across maturational stages in males and females. A secondary purpose was to determine if a field test of strength and power predicts dynamic valgus alignment.Design: Cross-sectional study.Setting: Laboratory.Patients or Other Participants: 157 young athletes (78 females, 79 males) aged 9 to 18 years.Intervention(s): Subjects performed drop-jump landings and single-leg triple-hop tests as part of a broader injury screening.Main Outcome Measure(s): Maturational status was ascertained from self-report questionnaires and grouped according to Tanner stages 1 and 2 (MatGrp1), 3 and 4 (MatGrp2), and 5 (MatGrp3). Frontal-plane knee valgus displacement, which served as a measure of dynamic valgus alignment, and single-leg triple-hop distance were assessed.Results: Males demonstrated less dynamic valgus alignment during drop jumps in the latter maturational stages (MatGrp1 = 13.1 degrees +/- 8.7 degrees, MatGrp2 = 9.0 degrees +/- 6.2 degrees, MatGrp3 = 9.2 degrees +/- 9.4 degrees), whereas females increased dynamic valgus alignment throughout maturation (MatGrp1 = 11.5 degrees +/- 6.9 degrees, MatGrp2 = 12.8 degrees +/- 8.8 degrees MatGrp3 = 15.5 degrees +/- 8.7 degrees). Thus, in the more mature groups, males had less dynamic valgus alignment than females. Both males (MatGrp1 = 393.5 +/- 63.7 cm, MatGrp2 = 491.8 +/- 95.1 cm, MatGrp3 = 559.3 +/- 76.3 cm) and females (MatGrp1 = 360.3 +/- 37.1 cm, MatGrp2 = 380.1 +/- 44.3 cm, MatGrp3 = 440.0 +/- 66.2 cm) increased triple-hop distance, but males increased more. Within each subgroup of MatGrp and sex, triple-hop distance had no predictive ability for dynamic malalignment.Conclusions: When dynamic valgus alignment and strength were assessed, sex and maturational status displayed an interaction. However, functional strength did not predict degree of dynamic valgus alignment.