ASSESSMENT OF MUSCULO-ARTICULAR AND MUSCLE STIFFNESS IN YOUNG AND OLDER MEN
ASSESSMENT OF MUSCULO-ARTICULAR AND MUSCLE STIFFNESS IN YOUNG AND OLDER MEN
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DOI：
10.1002/mus.23354
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发表时间：
2012-10-01
期刊：
影响因子：
3.4
通讯作者：
De Vito, Giuseppe
中科院分区：
文献类型：
--
作者：
Ditroilo, Massimiliano;Cully, Louise;De Vito, Giuseppe
简介：这项横断面研究的目的是同时评估年轻人和老年人膝关节伸肌的肌肉关节僵硬度（MAS）和肌肉僵硬度（MS）。研究方法：对14名年轻（22.1 ± 3.0岁）和12名老年（65.4 ± 5.7岁）男性进行了膝伸肌最大随意收缩（MVC）、扭矩发展率（RTD）、肌肉厚度、MAS和MS测试。结果如下：年轻组的MVC、RTD和肌肉厚度较高（分别为288.6 vs. 194.3 Nm、1319.5 vs. 787.0 Nm s（-1）、23.1 vs. 17.7 mm，P < 0.05）。两组之间的MAS标准化为支持负荷（MVC的30%）没有差异（87.9 vs. 88.5 Nm（-1）kg（-1）），而老年组的标准化MS水平更高（23.2 vs. 18.6 Nm（-1）kg（-1），P < 0.05）。结论：MS的决定因素已被强调沿着其在MS升高中的作用。MAS水平不变，这在老龄化人群中具有重要的功能，可能通过降低肌腱刚度来实现。肌肉神经46：559-565，2012
Introduction: The aim of this cross-sectional study was to concurrently assess musculo-articular stiffness (MAS) and muscle stiffness (MS) of the knee extensors in younger and older individuals. Methods: Fourteen young (22.1 +/- 3.0 years old) and 12 older (65.4 +/- 5.7 years old) men were tested for maximal voluntary contraction (MVC), rate of torque development (RTD), muscle thickness, MAS, and MS of knee extensors. Results: MVC, RTD, and muscle thickness were higher in the younger group (288.6 vs. 194.3 Nm, 1319.5 vs. 787.0 Nm s(-1), 23.1 vs. 17.7 mm, respectively, P < 0.05). MAS normalized to the load supported (30% of MVC) was not different between groups (87.9 vs. 88.5 Nm(-1) kg(-1)), whereas the older group exhibited a higher level of normalized MS (23.2 vs. 18.6 Nm(-1) kg(-1), P < 0.05). Conclusions: Determinants of MS have been highlighted along with their role in elevated MS. The unaltered level of MAS, which is functionally important in an aging population, might be achieved through a decrease in tendon stiffness. Muscle Nerve 46: 559-565, 2012