Size-strength relationships of the elbow flexors and extensors are not affected by age or gender
Size-strength relationships of the elbow flexors and extensors are not affected by age or gender
复制标题
肘部屈肌和伸肌的大小与力量关系不受年龄或性别的影响
DOI：
10.1080/17461391.2010.509890
复制
发表时间：
2011
影响因子：
3.2
通讯作者：
Kawakami Y
中科院分区：
文献类型：
--
作者：
Akagi R;Takai Y;Ohta M;Kanehisa H;Fukunaga T;Kawakami Y
在本研究中，我们研究了年轻人和老年人的肘屈肌和伸肌的肌肉体积和关节扭矩之间的关系，目的是评估年龄对这些关系的影响。参与者包括 45 名年轻人（27 名男性和 18 名女性，年龄 20-37 岁）和 51 名老年人（19 名男性和 32 名女性，年龄 60-77 岁）。使用扭矩计测量等长最大随意肘部屈曲和伸展过程中产生的关节扭矩。通过磁共振成像确定肘屈肌和伸肌的肌肉体积。对于肘屈肌，年轻人和老年人的关节扭矩与肌肉体积显着相关（r=0.564-0.872）。老年男性和女性以及年轻男性和女性的肘部伸肌的肌肉体积和关节扭矩之间也存在显着相关性（r=0.715-0.826）。肌肉体积和关节扭矩之间的回归线的截距均与零没有显着差异。此外，没有观察到年龄或性别对肘屈肌和伸肌单位肌肉体积的关节扭矩的显着影响。目前的结果表明，对于两个肌肉群来说，无论年龄和性别如何，肌肉体积都是关节扭矩的主要决定因素。
In the present study, we examined the relationships between muscle volume and joint torque for the elbow flexors and extensors in young and elderly individuals, with the aim of evaluating age effects on these relationships. The participants were 45 young (27 men and 18 women aged 20–37 years) and 51 elderly (19 men and 32 women aged 60–77 years) individuals. The joint torques developed during isometric maximal voluntary elbow flexion and extension were measured using a torque meter. The muscle volumes of the elbow flexors and extensors were determined by magnetic resonance imaging. For the elbow flexors, joint torque was significantly correlated with muscle volume in both young and elderly individuals (r=0.564–0.872). There were also significant correlations between muscle volume and joint torque for the elbow extensors in elderly men and women as well as in young men and women (r=0.715–0.826). None of they-intercepts of the regression lines between muscle volume and joint torque were significantly different from zero. Furthermore, no significant age or gender effects on the joint torque per muscle volume of the elbow flexors and extensors were observed. The present results suggest that muscle volume is a main determinant of joint torque regardless of age and gender, for both muscle groups.