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首页> 美国卫生研究院文献>International Biomechanics >An exploration of the differences in hip strength gluteus medius activity and trunk pelvis and lower-limb biomechanics during different functional tasks
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An exploration of the differences in hip strength gluteus medius activity and trunk pelvis and lower-limb biomechanics during different functional tasks

机译：不同功能任务期间髋关节强度臀肌髓质活性和躯干骨盆和下肢生物力学差异的探讨

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摘要

The purpose of the study was to explore differences in the coronal biomechanics of the trunk, pelvis, hip, and knee joints, and gluteus medius muscle activity (GMed) during walking and step down from two riser heights. Joint kinematics and kinetics from 20 healthy participants were recorded using a 10-camera Qualisys system and force plates, and GMed EMG was recorded using a Delsys Trigno system. Hip abductor strength was measured using a hand-held dynamometer. Pelvic obliquity and lateral trunk bending excursions were significantly higher in walking than in step-down tasks. Significantly greater knee adduction moments were seen during both step-down tasks compared to level walking with significantly greater GMed activity. However, a significant interaction between side and task was seen for hip adduction moment, with step-down tasks showing lower hip moments than during walking, with greater peak hip moments being more apparent in the dominant limb. This suggests the GMed has a greater stabilizing role during the step-down tasks, although walking required a greater mechanical demand. Health professionals should expect to find less excursion of lateral trunk bending in step-down tasks compared to level walking and consider that GMed has different roles in these two tasks.
机译：该研究的目的是在行走过程中，探索在躯干，骨盆，臀部，关节和膝关节，以及臀中肌的活性（GMed）的冠生物力学差异和来自两个提升管高度下台。使用10相机Qualisys系统和测力板从20名健康参与者关节的运动学和动力学记录，并使用Delsys Trigno系统GMed EMG记录。髋关节外展强度使用手持式测力计测量。骨盆倾斜和侧向主干弯曲偏移行走均显著高于降压任务。显著更大的膝盖内收的时刻进行期间相比有显著更大GMed活动水平都散步降压任务看出。然而，侧面和任务之间的显著的相互作用也被视为是髋关节内收的时刻，有降压的任务显示髋关节时刻比步行时低，具有较大的峰值臀部的时刻是在占主导地位的肢体更加明显。这表明GMed具有较大的稳定期间降压任务的角色，虽然走路需要更大的机械需求。健康专家应该找横向主干弯曲的少游降压任务相比，水平的步行和考虑GMed在这两个任务的不同角色。

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