Sex differences in anticipatory postural adjustments during rapid single leg lift
Sex differences in anticipatory postural adjustments during rapid single leg lift
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DOI：
10.1016/j.humov.2017.10.003
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发表时间：
2018-02-01
影响因子：
2.1
通讯作者：
Shemmell, Jonathan
中科院分区：
文献类型：
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作者：
Bussey, Melanie D.;de Castro, Marcelo Peduzzi;Shemmell, Jonathan
本研究的目的是评估性别对健康受试者在单次抬腿任务中预期姿势调整（APA）的动力学、运动学和神经肌肉相关性的影响。50名健康年龄和体重指数匹配的参与者（25名女性和25名男性）用他们的优势和非优势下肢进行20次单腿提升任务（髋关节屈曲至90度，尽可能快）。使用测力板确定压力中心的内外侧位移（COPML）和重心转移的起始（To）;使用运动学确定抬腿（T-1）;使用肌电图确定8块肌肉的起始时间：双侧外斜肌、内斜肌和腰多裂肌，以及单侧（站立肢体）臀大肌和股二头肌。分析中包括运动控制肢体优势。对于T-1、COPML和肌肉起始，观察到性别和肢体优势之间的统计学显著相互作用（p < .001）。此外，观察到性别对To的统计学显著主效应。与男性相比，女性的优势肢体阿帕时间（T-1）和幅度（COPML）增加。这种性别差异并没有发生在非优势肢体。女性比男性更晚招募近端肌肉。总体而言，女性似乎有更强的影响肢体优势，他们的预期姿势控制策略，需要进一步调查。目前的研究结果表明，女性和男性不同，在他们的预期姿势控制策略快速单腿电梯。
The aim of this study was to assess the influence of sex on the kinetic, kinematic and neuromuscular correlates of anticipatory postural adjustments (APAs) during a single leg lift task performed by healthy participants. Fifty healthy age and body mass index matched participants (25 women and 25 men) performed 20 single leg lift task (hip flexion to 90 degrees as quickly as possible) with their dominant and their non-dominant lower limbs. A force plate was used to determine the medial-lateral displacement of the center of pressure (COPML), and the initiation of weight shift (To); kinematics was used to determine leg lift (T-1); and electromyography was used to determine onset times from eight muscles: bilateral external oblique, internal oblique and lumbar multifidus, and unilateral (stance limb) gluteus maximus and biceps femoris. Movement control limb dominance was included in the analysis. Statistically significant interactions between sex and limb dominance (p < .001) were observed for T-1, COPML, and muscle onsets. Also, statistically significant main effect of sex on To was observed. Women showed increased APA time (T-1) and magnitude (COPML) in their dominant limbs compared to men. Such differences between sexes did not occur in the non-dominant limb. Women recruited proximal muscles later than their man counterparts. Overall, women appear to have a stronger effect of limb dominance on their anticipatory postural control strategy which requires further investigation. The findings of the current study indicate that women and men differ in their anticipatory postural control strategy for rapid single leg lift.