Age-related increase in muscle stiffness is muscle length dependent and associated with muscle force in senior females.
Age-related increase in muscle stiffness is muscle length dependent and associated with muscle force in senior females.
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DOI：
10.1186/s12891-021-04519-8
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发表时间：
2021-09-27
影响因子：
2.3
通讯作者：
Hug F
中科院分区：
文献类型：
--
作者：
Xu J;Fu SN;Hug F
在衰老过程中，肌肉僵硬被认为是与发力能力下降相关的因素之一。关于成年女性股四头肌被动僵硬与年龄相关的变化的研究结果不一致。因此，本研究的目的是确定衰老对股四头肌浅层肌头剪切模量的影响，并探讨其与膝关节伸展力的关系。使用剪切波弹性成像技术测量 20 名年轻女性和 20 名老年女性在休息时股直肌 (RF)、股外侧肌 (VL) 和股内侧肌 (VM) 的被动剪切模量。在膝关节屈曲 30°、60°、90° 和 105° 四个膝关节位置重复测量。在膝关节屈曲 30°、60° 和 90° 时评估最大等长自愿膝关节伸展力。根据我们的研究结果，在膝关节屈曲 60° 或超过 60° 时，老年人的 RF 被动肌肉剪切模量（增加 34% – 68%；所有 p<0.05）和 VL 肌头（增加 13%–16%，所有 p<0.05）显着较高。在膝关节屈曲 105° 时，VM 与年龄相关的增加很明显（增加 11%，p = 0.020）。 RF剪切模量与老年人在60°时测量的最大等长自主收缩力呈负相关（r = − 0.485，p = 0.030）。当以长肌肉长度测量时，老年女性股四头肌浅表肌头的被动僵硬更大。在老年女性中，RF 的被动刚度已被确定仅在 60° 膝关节屈曲时与膝关节伸肌力呈负相关。没有发现与其他角度和肌肉有显着关联。
In aging, muscle stiffness is considered as one of the factors associated with the reduction of force generation capability. There have been inconsistent findings on age-related alteration in the passive stiffness of quadriceps muscle in the female adults. Thus, the aim of this study was to determine the effect of aging on the shear moduli of the superficial muscle heads of the quadriceps and to explore its relationship with knee extension force. Passive shear moduli of the rectus femoris (RF), vastus lateralis (VL), and vastus medialis (VM) were measured at rest using shear wave elastography in 20 young and 20 senior female adults. Measurements were repeated at four knee joint positions, that is, 30°, 60°, 90°, and 105° of knee flexion. Maximal isometric voluntary knee extension force was assessed at 30°, 60°, and 90° of knee flexion. As per our findings, senior adults were determined to have significantly higher passive muscle shear moduli in the RF (by 34% – 68%; all p < 0.05) and the VL muscle heads (by 13%–16%, all p < 0.05) at and beyond 60° of knee flexion. Age-related increase in the VM was evident at 105° knee flexion (by11%, p = 0.020). The RF shear modulus was negatively correlated to the maximal isometric voluntary contraction force measured at 60° (r = − 0.485, p = 0.030) in senior adults. Senior female adults had greater passive stiffness at the superficial muscle heads of the quadriceps muscles when measured at long muscle length. Among the senior female adults, the passive stiffness of RF has been determined to have a negative association with the knee extensor force only at 60° knee flexion. No significant association was noted for other angles and muscles.
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影响因子：
2.9
作者：
Bachasson, Damien;Dubois, Guillaume J. R.;Hogrel, Jean-Yves
通讯作者：
Hogrel, Jean-Yves
影响因子：
3.4
作者：
Ditroilo, Massimiliano;Cully, Louise;De Vito, Giuseppe
通讯作者：
De Vito, Giuseppe
影响因子：
4
作者：
Miller MS;Callahan DM;Toth MJ
通讯作者：
Toth MJ
影响因子：
1.4
作者：
Domire, Zachary J.;McCullough, Matthew B.;An, Kai-Nan
通讯作者：
An, Kai-Nan
影响因子：
--
作者：
Muraki S;Fukumoto K;Fukuda O
通讯作者：
Fukuda O