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患有慢性脚不稳定的个体在膝盖延伸肌和肌最大和次最大同位体强度方面表现出异常

Luciana Labanca¹, Roberto Tedeschi², Massimiliano Mosca³

¹Physical Medicine and Rehabilitation Unit, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy.

The American journal of sports medicine

|March 9, 2024

概括

慢性脚不稳定 (CAI) 损害了膝盖曲器的强度,并改变了膝盖伸缩器和曲器肌肉的稳定性和准确性. 这些发现凸显了CAI在脚关节之外的广泛的神经肌肉影响.

科学领域:

生物力学生物力学
神经肌肉控制控制神经肌肉控制
运动医学运动医学

背景情况:

慢性脚不稳定 (CAI) 与近接关节神经肌肉控制的改变有关.
虽然部和脚肌肉的强度在CAI中得到了很好的研究,但膝盖延伸肌和 flexor肌的数据有限且相互矛盾.

研究的目的:

评估CAI患者的最大和次最大同位体肌肉强度.

主要方法:

一项受控的实验室研究比较了15名单边CAI患者和15名健康对照患者.
使用最大等距离自发收缩和次最大收缩 (20%, 50%, 80% MVIC) 来评估膝盖延伸器和器的强度,稳定性和30°和90°膝盖曲的精度.
在评估期间,表面肌电图监测肌肉激活.

主要成果:

患有CAI的个体在30°和90°的受伤四肢中表现出显著较低的最大同度膝盖曲器强度.
与对照者相比,患有CAI的个体的两只四肢的膝关节伸缩肌和曲肌的稳定性和精度都受到损害,特别是在30°膝关节曲时.
两组之间没有观察到最大膝盖延伸器强度或肌肉激活的显著差异.

结论:

CAI与膝盖屈曲肌的最大和次最大同位体强度以及膝盖延伸肌的次最大强度的缺陷有关.
需要进一步的研究来阐明这些神经肌肉异常的潜在机制.

关键词:

卡伊尔 (CAI) 是一个非常有价值的机构.腿筋腿筋腿筋四头四头四肢是什么意思稳定性是一致性.

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