Effect of hip flexion angle on stiffness of the adductor longus muscle during isometric hip flexion
Effect of hip flexion angle on stiffness of the adductor longus muscle during isometric hip flexion
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DOI：
10.1016/j.jelekin.2020.102493
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发表时间：
2021-02-01
影响因子：
2.5
通讯作者：
Katayose, Masaki
中科院分区：
文献类型：
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作者：
Kato, Takuya;Taniguchi, Keigo;Katayose, Masaki
本研究旨在探讨髋关节屈曲角度对长收肌（AL）在等长屈髋时僵硬度的影响。招募了17名男子。10名参与者在髋关节屈曲0度、40度和80度进行MVC后，在等长髋关节屈曲期间以最大自主收缩（MVC）的0%、25%、50%和75%进行次最大自主收缩。七名参与者在髋关节屈曲任务之外，在等长髋关节伸展期间执行次最大自愿任务。AL肌肉的剪切模量被用作肌肉刚度的指标，并且在每个髋关节屈曲角度的每个收缩强度的任务期间使用超声剪切波弹性成像来测量。在髋关节屈曲过程中，AL肌肉的剪切模量在0度时高于在40度和80度屈曲时的每种收缩强度（p < 0.016）。相反，在75% MVC时髋关节伸展期间，未发现髋关节屈曲角度的显著影响（p = 0.867）。这些结果表明，在髋关节等长屈曲过程中，AL肌肉的机械应力可能在髋关节屈曲0度时更高。
This study examined the effect of hip flexion angle on the stiffness of the adductor longus (AL) muscle during isometric hip flexion. Seventeen men were recruited. Ten participants performed submaximal voluntary contraction at 0%, 25%, 50%, and 75% of maximal voluntary contraction (MVC) during isometric hip flexion after performing MVC at 0 degrees, 40 degrees, and 80 degrees of hip flexion. Seven participants performed submaximal voluntary tasks during isometric hip extension in addition to hip flexion task. The shear modulus of the AL muscle was used as the index of muscle stiffness, and was measured using ultrasound shear-wave elastography during the tasks at each contraction intensity for each hip flexion angle. During hip flexion, the shear modulus of the AL muscle was higher at 0 degrees than at 40 degrees and 80 degrees of hip flexion at each contraction intensity (p < 0.016). Conversely, a significant effect was not found among hip flexion angle during hip extension at 75% of MVC (p = 0.867). These results suggest that mechanical stress of the AL muscle may be higher at 0 degrees of hip flexion during isometric hip flexion.