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

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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

池田 匠 木津 彰斗 宮﨑 大貴 東久保 佳生 石濱 崇史 末廣 健児 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.23, pp.44-50, 2023 (Released:2023-12-22)

参考文献数

8

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In this study, we investigated the muscle activity that causes spinal and pelvic movements and changes inspinal and pelvic alignment when performing forward reaching in the sitting position at 0.5 seconds, which issimilar to the speed of the flexion phase of standing up movements. We measured the muscle activities of thelongissimus, multifidus and ilicostalis muscles, and the angular changes of the spinal column and hip joint of20 healthy men performing anterior reach motion in the sitting position. The results show that the activity ofall muscles weakened at the time of 20% from the start of movement and tended to increase significantly after40%. In addition, the angle change of the spinal column and hip joint showed flexion of the lower thoracicspine from the time of 20% to 40%, and after 40%, the anterior reach distance increased significantly as theflexion angle of the hip joint increased. The results of this study show that there is a difference in the purposeof exercise between the phase up to 40% of the time from the movement start and the phase that follows.

著者

石濱 崇史 木津 彰斗

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.15, pp.3-6, 2015 (Released:2016-01-06)

参考文献数

4

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Visual observation and electromyographic evaluation of the movement from the sitting position to the supine position were performed. In the movement from the sitting position to the side-lying position, the forearm of the upper limb supports the lateral bending of the trunk after elevation of the pelvis. The pelvis is elevated by the muscle activity of the oblique muscle on the opposite side, which is important.

著者

木津 彰斗 石濱 崇史

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.18, pp.3-10, 2018 (Released:2018-12-20)

参考文献数

3

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To deepen understanding of the normal for sitting from supine, 10 men and women were examined using motion analysis and electromyography. Motion was classified into three categories, namely sitting from supine with arm support on one side, sitting from supine with arm support on both sides, and sitting from supine with the sitting position with extended legs. The muscle activities of the right and left rectus abdominis muscles and right and left abdominal oblique muscle overlapping sites were examined using electromyography. A common feature of the three motions was the absence of rotation or side bending of the trunk. In addition, as segmental rotation and lateral bending of the trunk do not occur, the activities of the upper limbs are suggested to be important with regard to raising and rotating the body.

著者

木津 彰斗 末廣 健児 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.20, pp.52-58, 2020 (Released:2020-12-28)

参考文献数

9

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This study examined and compared the pelvic tilt angle and movement characteristics of a forward-reaching task at different speeds in the sitting position. Seven healthy males each performed a forward-reaching movement toward a target 20 cm ahead within periods of 2 seconds, 1 second, and 0.5 second. It was found that the thoracic vertebra tended to bend immediately after the initiation of movement in all the tasks. Additionally, in the 2-second and 1-second tasks, the pelvis showed a change in angle, tilting forward at initiation of the movement. In the 0.5-second task, however, the pelvis exhibited a slight change in angle, tilting backward to maintain posture at the initiation of movement.