Methodological Issues Related to Thickness-Based Muscle Size Evaluation
Methodological Issues Related to Thickness-Based Muscle Size Evaluation
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DOI：
10.2114/jpa2.30.169
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发表时间：
2011-07-01
影响因子：
3.1
通讯作者：
Kawakami, Yasuo
中科院分区：
文献类型：
--
作者：
Akagi, Ryota;Iwanuma, Soichiro;Kawakami, Yasuo
本研究的目的是强调在实地研究中通常进行的基于厚度的肌肉大小评估相关的问题。横截面积、厚度(垂直距离的上端肘屈肌与肱部)和宽度(从左向右的水平距离的肘部屈肌)肘屈肌水平的参考站点(60%的上臂长度从肩峰的肩胛骨的肱骨外上髁)到5厘米远,它是确定在11个年轻人使用磁共振成像,静息时和等距屈曲时均为最大自主收缩量的30%。在最大自愿收缩的30%时，与静止时相比，各测量部位的厚度增加而宽度减小。这可能是由于两种情况下肌肉松弛程度的不同。肘关节屈肌厚度与横截面积的相关系数在静止时（r=0.551-0.856）明显低于最大自主收缩30%时（r=0.711-0.922）。目前的研究结果表明，基于厚度的肌肉尺寸测量在休息时包括误差，由于松弛的肌肉休息。人类生理杂志30(4):169-174,2011 http://www.jstage.jst.go.jp/browse/jpa2 [DOI: 10.2114/jpa2.30.169]
The purpose of this study was to highlight the issues related to thickness-based muscle size evaluation that is commonly done in :field studies. The cross-sectional area, thickness (the vertical distance from the upper end of the elbow flexors to that of the humerus) and width (the horizontal distance from the left to the right end of the elbow flexors) of the elbow flexors at levels from the reference site (60% of the upper arm length from the acromial process of the scapula to the lateral epicondyle of the humerus) to 5 cm distal to it were determined in 11 young men using magnetic resonance imaging, both at rest and during isometric elbow flexion at 30% of maximal voluntary contraction. During 30% of maximal voluntary contraction, the thickness increased but the width decreased at each measurement site compared with those at rest. This was possibly due to difference in muscle slackness between both conditions. The correlation coefficients between the thickness and cross-sectional area for the elbow flexors were significantly lower at rest (r=0.551-0.856) than during 30% of maximal voluntary contraction (r=0.711-0.922). The present findings indicate that the thickness-based muscle size measurement at rest includes errors owing to the slackness of the resting muscles. J Physiol Anthropol 30(4): 169-174, 2011 http://www.jstage.jst.go.jp/browse/jpa2 [DOI: 10.2114/jpa2.30.169]