Component characteristics of thigh muscle volume in young and older healthy men
Component characteristics of thigh muscle volume in young and older healthy men
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DOI：
10.1111/j.1475-097x.2011.01057.x
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发表时间：
2012-03-01
影响因子：
1.8
通讯作者：
Abe, Takashi
中科院分区：
文献类型：
--
作者：
Ogawa, Madoka;Yasuda, Tomohiro;Abe, Takashi
本研究的目的是比较日本青年和老年男性大腿肌肉体积的组成特征。年轻男性（YM, n = 15）和老年男性（OM, n = 13）的研究对象都是身体活跃的（每周进行13次有氧运动），但在研究前至少3年没有一个研究对象定期参加阻力训练。从大腿获得连续的横向磁共振成像（1.5 t扫描仪）图像，通过将肌肉横截面积（CSA）乘以切片厚度和总切片数来计算总和单个（股四头肌、腘绳肌和内收肌）肌肉体积。测定每块肌肉的肌肉长度和平均肌肉CSA（肌肉体积除以肌肉长度）。测量最大自主等距（MVC）膝关节伸展和屈曲强度，肌肉质量定义为每单位平均肌肉CSA的MVC （MVC/CSA）。股四头肌体积和平均CSA分别降低20%和16% (P
The purpose of this study was to compare the component characteristics of thigh muscle volume in Japanese young and older men. The subjects in both young (YM, n = 15) and older (OM, n = 13) men were physically active (performed aerobic-type exercise 13 times per week), but none of the subjects had regularly participated in resistance training for a minimum of 3 years prior to the study. Contiguous transverse magnetic resonance imaging (1.5-T scanner) images were obtained from the thigh, and total and individual (quadriceps, hamstrings and adductors) muscle volumes were calculated by multiplying the muscle cross-sectional area (CSA) by slice thickness and the total number of slices. Muscle length and average muscle CSA (muscle volume divided by muscle length) were determined for each muscle. Maximum voluntary isometric (MVC) knee extension and flexion strength were measured, and muscle quality was defined as MVC per unit average muscle CSA (MVC/CSA). Quadriceps muscle volume and average CSA were, respectively, 20% and 16% lower (P