Shirai Takanao, Ijiri Tomohito, Suzuki Toshiaki
Department of Rehabilitation, Medical Corporation Juzankai: 4-2-8 Iwatacho, Higashiosaka-shi, Osaka 578-0941, Japan.
Graduate School of Health Sciences, Kansai University of Health Sciences, Japan.
J Phys Ther Sci. 2022 Nov;34(11):732-736. doi: 10.1589/jpts.34.732. Epub 2022 Nov 1.
[Purpose] The purpose of the present study was to investigate whether the extent of shoulder internal rotation measured in the extended position of the shoulder could be a good indicator of hand-behind-back motion ability. [Participants and Methods] We measured internal rotation with the shoulder in extension in 26 healthy adults (average age, 25.2 ± 2.5 years). Internal rotation was measured passively in the supine position at 30° of shoulder extension. Additionally, a hand-behind-back motion was performed, and the hand-behind-back distance was measured. The relationship between the angle of internal rotation with the shoulder in extension and hand-behind-back distance was evaluated using Pearson's product-moment correlation. The level of significance was set at 5%. [Results] The angle of internal rotation with the shoulder in extension and the hand-behind-back distance correlate significantly. [Conclusion] Internal rotation with the shoulder in extension is a good indicator of hand-behind-back motion.
[目的]本研究旨在探讨在肩部伸展位测量的肩部内旋程度是否可作为背手动作能力的良好指标。[参与者与方法]我们对26名健康成年人（平均年龄25.2±2.5岁）在肩部伸展位时的内旋情况进行了测量。在仰卧位、肩部伸展30°时被动测量内旋。此外，进行背手动作，并测量背手距离。使用Pearson积差相关评估肩部伸展时的内旋角度与背手距离之间的关系。显著性水平设定为5%。[结果]肩部伸展时的内旋角度与背手距离显著相关。[结论]肩部伸展时的内旋是背手动作的良好指标。
