著者

木津 彰斗 末廣 健児 國枝 秀樹 石濱 崇史 池田 幸司 鈴木 俊明

出版者

関西理学療法学会

雑誌

関西理学療法 (ISSN:13469606)

巻号頁・発行日

vol.16, pp.43-47, 2016 (Released:2016-12-29)

参考文献数

3

被引用文献数

5

---

The purpose of this study was to illustrate the actions of the gluteus maximus (GM), medial hamstrings (MH), and lateral hamstrings (LH) during forward-reaching in a sitting position using electromyography (EMG). We found that as the distance of forward-reaching increased, EMG activity of the GM, MH, and LH muscles increased to maintain forward-bending of the trunk. In addition, lower GM activation increased at a shorter reaching distance than the upper GM. From the analysis of posture during this task, we also found that the distance covered during forward-reaching was increased by up to 15 cm mainly through flexion of the thoracic spine. This mechanism enhances the distance of forward-reaching achieved by flexion of the hip joint, but extension of the lumbar spine. From these results, we suggest that forward reaching is not simply caused by flexion of the hip joint and that each fiber of GM, MH, and LH muscles has a different function in the sequence of activities that leads to a change in posture.

著者

國枝 秀樹 末廣 健児 大沼 俊博 渡邊 裕文 石濱 崇史 鈴木 俊明

出版者

関西理学療法学会

雑誌

関西理学療法 (ISSN:13469606)

巻号頁・発行日

vol.14, pp.43-47, 2014 (Released:2014-12-27)

参考文献数

5

被引用文献数

1

---

The purpose of this study was to investigate the electromyographic (EMG) activities of the multifidus, longissimus, and iliocostal muscles in the standing and forefoot standing positions in order to understand the relationship between each muscle activity and thoracolumbar extension in the forefoot standing position. This study recruited 10 healthy male volunteers (mean age: 28.4 ± 6.1 years). The EMG activities of the multifidus, longissimus, and iliocostal muscles were measured in the standing and forefoot standing positions. The values of the integrated EMG activities of each task were compared. Each muscle showed a significant increase in the value of the integrated EMG activities in the forefoot standing position (p<0.01). The activities of the iliocostal muscles were separated into two types: Group A, in which the EMG activities did not increase much, and Group B, in which the EMG activities clearly increased. In group A, the forefoot standing position involved extension of the hip joint, and lumbar alignment was almost identical to that in the standing position. In group B, lumbar lordosis and anteversion of the pelvis were significantly greater in the forefoot standing position than in the standing position.