Corticomotor excitability of gluteus maximus and hip extensor strength: The influence of sex.

Corticomotor excitability of gluteus maximus and hip extensor strength: The influence of sex.
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DOI:
10.1016/j.humov.2021.102830
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发表时间:
2021-08
影响因子:
2.1
通讯作者:
Powers, Christopher M.
Powers, Christopher M.
中科院分区:
心理学3区
文献类型:
--
作者:
Shih, Yo;Fisher, Beth E.;Kutch, Jason J.;Powers, Christopher M.

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比较男性和女性的髋部伸肌力量和臀大肌 (GM) 皮质运动兴奋性 (CME)。第二个目的是确定 GM 的 CME 是否可以预测髋部伸肌力量。 32 名健康个体参与其中(15 名男性和 17 名女性)。使用从经颅磁刺激(平均斜率)获得的输入输出曲线(IOC)程序评估GM的CME。在最大自主等长收缩期间通过测力计测量髋部伸肌力量。使用独立 t 检验来比较男性和女性之间 GM 的 CME 和峰值髋部伸肌扭矩。使用线性回归分析来确定峰值髋部伸肌扭矩是否由 GM 的 CME 预测。与男性相比,女性的髋部伸肌峰值扭矩较低(4.42 ± 1.11 vs. 6.15 ± 1.72 Nm/kg/m2,p < 0.01),GM 的 CME 较低(1.36 ± 1.07 vs. 2.67 ± 1.30,p < 0.01)。 GM 的 CME 是男性和女性髋关节伸肌峰值扭矩的显着预测因子(r2 = 0.36,p < 0.001)。我们的研究结果支持这样的前提:皮质运动兴奋性在肌肉产生扭矩的能力中发挥作用。
To compare hip extensor strength and corticomotor excitability (CME) of gluteus maximus (GM) between males and females. A secondary purpose was to determine if CME of GM is predictive of hip extensor strength. Thirty-two healthy individuals participated (15 males and 17 females). CME of GM was assessed using the input-output curve (IOC) procedure acquired from transcranial magnetic stimulation (average slope). Hip extensor strength was measured by a dynamometer during a maximal voluntary isometric contraction. Independent t-tests were used to compare CME of GM and peak hip extensor torque between males and females. Linear regression analysis was used to determine whether peak hip extensor torque was predicted by CME of GM. Compared to males, females demonstrate lower peak hip extensor torque (4.42 ± 1.11 vs. 6.15 ± 1.72 Nm/kg/m2, p < 0.01) and lower CME of GM (1.36 ± 1.07 vs. 2.67 ± 1.30, p < 0.01). CME of GM was a significant predictor of peak hip extensor torque for males and females combined (r2 = 0.36, p < 0.001). Our findings support the premise that corticomotor excitability plays a role in the ability of a muscle to generate torque.
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