Jang Eun-Mi, Yoo Won-Gyu
Department of Rehabilitation Science, Graduate School, Inje University, Republic of Korea.
Department of Physical Therapy, College of Biomedical Science and Engineering, Inje University, Republic of Korea.
J Phys Ther Sci. 2014 Dec;26(12):1963-4. doi: 10.1589/jpts.26.1963. Epub 2014 Dec 25.
[Purpose] The purpose of this study was to compare the activation of the gluteus medius (Gmed), rectus femoris (RF), and biceps femoris (BF) muscles during neutral (N) sit to stand (STS) and STS involving hip abduction (ABD) in elderly females. [Subjects] We recruited 16 healthy elderly females with no pain in the knee joint or any other orthopedic problems of the lower limbs. [Methods] The activities of the dominant lower extremity muscles were measured using a wireless electromyography (EMG) system. Subjects then undertook a total of six STS trials: three for neutral STS and three for STS involving hip abduction. [Results] In the pre-TO phase, activation of the RF muscle was significantly increased during hip ABD. In the post-TO phase during hip ABD, Gmed muscle activation was significantly increased, and RF muscle activation was significantly decreased. [Conclusion] This study suggests that STS involving hip ABD is more effective in decreasing Gmed activation and reducing RF effort in elderly females.
[目的] 本研究旨在比较老年女性在中立位（N）坐立位转换（STS）以及涉及髋关节外展（ABD）的坐立位转换过程中，臀中肌（Gmed）、股直肌（RF）和股二头肌（BF）的激活情况。[受试者] 我们招募了16名健康的老年女性，她们膝关节无疼痛且下肢无其他骨科问题。[方法] 使用无线肌电图（EMG）系统测量优势下肢肌肉的活动。受试者随后总共进行了六次坐立位转换试验：三次中立位坐立位转换试验和三次涉及髋关节外展的坐立位转换试验。[结果] 在离地前（pre - TO）阶段，髋关节外展时股直肌的激活显著增加。在髋关节外展的离地后（post - TO）阶段，臀中肌的激活显著增加，而股直肌的激活显著降低。[结论] 本研究表明，涉及髋关节外展的坐立位转换在降低老年女性臀中肌激活和减少股直肌用力方面更有效。
