Age-related differences of extremity joint torque of healthy Japanese

Age-related differences of extremity joint torque of healthy Japanese
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健康日本人四肢关节扭矩的年龄差异

DOI：
10.4017/gt.2005.04.01.005.00
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
Norio Miura
Norio Miura
中科院分区：
--
文献类型：
--
作者：
S. Hisamoto;M. Higuchi;Norio Miura

文献摘要

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研究人员测量了 20 至 79 岁日本无残疾男性和女性的重力补偿肢体关节扭矩 (EJT) 值，根据年龄建立 EJT 参考值，并确定与年龄相关的肌肉力量差异。方法 本研究招募了 1008 名受试者。 EJT 值是通过使用手持式测力计 (HHD) 在矢状面进行等距“制作”测试获得的。结果 总体而言，男性和女性各 EJT 值的年龄相关变化峰值均出现在 30 至 39 岁、40 至 49 岁和 50 至 59 岁年龄组。结果显示，20 至 29 岁女性的 EJT 值显着低于 40 至 49 岁和/或 50 至 59 岁的女性（p < 0.05，Dunnett t 检验，SPSS for Windows），上肢五种关节运动（即腕掌屈、腕背屈、肘屈曲、肘伸展和肩伸展）的 EJT 值显着较低，而下肢（即髋关节）的 EJT 值较低。与 50 至 59 岁和 60 至 69 岁的女性相比，屈曲程度更高。然而，20 至 29 岁的男性的 EJT 值并没有明显低于年龄较大的男性组。讨论本研究的结果表明，年轻的日本女性的肌肉力量低于年长的日本女性，这些结果得到了日本体能标准数据库中握力和垂直弹跳值与年龄相关的差异的支持。这种现象被认为是由于日本年轻女性不使用和/或不活动造成的。
Gravity-compensated extremity joint torque (EJT) values were measured in Japanese men and women without disabilities aged 20 to 79 years old to establish reference values for EJT according to age and to identify age-related differences in muscle strength. Methods 1008 subjects were recruited for this study. EJT values were obtained by isometric “make” tests in the sagittal plane with a hand-held dynamometer (HHD). Results On the whole, the peak age-related changes in each EJT value were in the 30 to 39, 40 to 49, and 50 to 59 years old age groups in both the men and the women. The results revealed significantly lower EJT values in women aged 20 to 29 than in women aged 40 to 49 and/or 50 to 59 (p < 0.05, Dunnett t test, SPSS for Windows) for five joint motions in the upper limbs, i.e., wrist palmar flexion, wrist dorsiflexion, elbow flexion, elbow extension, and shoulder extension, and lower values in the lower limbs, i.e., hip flexion than in women aged 50 to 59 and 60 to 69. However, the men aged 20 to 29 years old did not have any significantly lower EJT values than the older age groups of men. Discussion The results of this study show that younger Japanese women have less muscle strength than older Japanese women, and these results were supported by the age-related differences of grip strength and vertical jump values in the physical fitness standard database of Japanese. This phenomenon is supposed to be attributed to disuse and /or inactivity in Japanese younger women.