Shimada Kensuke, Onishi Tomo, Ogawa Yoshiko, Yamauchi Junichiro, Kawada Shigeo
Department of Sport and Medical Science, Faculty of Medical Technology, Teikyo University, Japan.
Teikyo University Institute of Sports Science and Medicine, Japan.
J Phys Ther Sci. 2017 Aug;29(8):1336-1340. doi: 10.1589/jpts.29.1336. Epub 2017 Aug 10.
[Purpose] This study aimed to develop a simple, inexpensive, and accurate method for measuring the strength of shoulder flexion (Experiment 1) and evaluate the bilateral force deficit in shoulder flexion (Experiment 2) in healthy subjects. [Subjects and Methods] In Experiment 1, maximal voluntary contractions (MVCs) in isometric shoulder flexion were measured on both sides using an isometric dynamometer (ID) and a hand-grip dynamometer (HGD), as an alternative dynamometer, in six subjects. In Experiment 2, bilateral force deficit was evaluated using HGD in 21 subjects who performed unilateral and bilateral MVCs in isometric flexions of the shoulder. The peak value of electromyography (PVE) in the lateral head of the biceps brachii and anterior deltoid was measured during MVCs. [Results] In Experiment 1, ID and HGD showed almost similar coefficients of variation. A strong positive correlation was found between the values obtained using the two methods. In Experiment 2, the bilateral force deficit in shoulder flexion associated with a reduced PVE (‒10.9%) was found in 85.7% of subjects. [Conclusion] The reproducibility of measurements was similar between ID and HGD. HGD could evaluate the bilateral force deficit in shoulder flexion and is a practical tool for measuring shoulder strength.
[目的] 本研究旨在开发一种简单、廉价且准确的测量健康受试者肩屈曲力量的方法（实验1），并评估肩屈曲时的双侧力量缺失情况（实验2）。[受试者与方法] 在实验1中，使用等长测力计（ID）和作为替代测力计的握力测力计（HGD），对6名受试者双侧的等长肩屈曲最大自主收缩（MVC）进行测量。在实验2中，对21名在肩部等长屈曲中进行单侧和双侧MVC的受试者，使用HGD评估双侧力量缺失情况。在MVC期间测量肱二头肌外侧头和三角肌前部的肌电图峰值（PVE）。[结果] 在实验1中，ID和HGD显示出几乎相似的变异系数。两种方法获得的值之间存在强正相关。在实验2中，85.7%的受试者出现了与PVE降低（-10.9%）相关的肩屈曲双侧力量缺失。[结论] ID和HGD测量的可重复性相似。HGD可评估肩屈曲时的双侧力量缺失情况，是测量肩部力量的实用工具。
