著者

Kazunori Okamura Shusaku Kanai Sadaaki Oki Satoshi Tanaka Naohisa Hirata Yoshiaki Sakamura Norikatsu Idemoto Hiroki Wada Akira Otsuka

出版者

The Society of Physical Therapy Science

雑誌

Journal of Physical Therapy Science (ISSN:09155287)

巻号頁・発行日

vol.29, no.6, pp.1001-1005, 2017 (Released:2017-06-07)

参考文献数

20

被引用文献数

11

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[Purpose] There are no reliable evidences that the weakening of intrinsic foot muscles causes the decrease of the medial longitudinal arch (MLA) height. The purpose of this study was to confirm whether the fatigue of intrinsic foot muscles decrease the MLA height during standing and gait using 3D motion analysis system. [Subjects and Methods] Twenty healthy male subjects participated in this study. Foot kinematics was measured using an Oxford Foot Model before and after fatigue-inducing exercises of the abductor hallucis and flexor hallucis brevis muscles. [Results] Following fatigue-inducing exercise, in both standing and gait, the MLA height did not decrease but slightly increased. In addition, the reduction of a rear foot eversion angle was noted. [Conclusion] Fatigue of the abductor hallucis and flexor hallucis brevis muscles did not cause a change associated with collapsing of the MLA during both standing and gait. This suggested that the MLA support force from these muscles would be compensated by other MLA support structures, such as extrinsic foot muscles.

著者

Masaki Hasegawa Shusaku Kanai Michele Eisemann Shimizu Sadaaki Oki Akira Otsuka

出版者

The Society of Physical Therapy Science

雑誌

Journal of Physical Therapy Science (ISSN:09155287)

巻号頁・発行日

vol.19, no.1, pp.77-81, 2007 (Released:2007-03-23)

参考文献数

9

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The purpose of this study was to investigate the function of Japanese Geta clogs. We measured the foot pressure and the distance between the Geta and the heel. An F-scan and three-dimensional motion analyses were done. Toe pressure increased in the stance phase at toe-off, and we confirmed that heel-Geta contact is present at the beginning of swing phase. The distance between the Geta and the heel increased from heel-off to toe-off and decreased from toe-off to mid-swing. The results suggest that active toe movement occurs during Geta gait, and the use of Geta clogs may contribute to preventing foot disorders and falls. Geta may be useful for foot and toe strengthening.

著者

Masaki Hasegawa Sadaaki Oki Tomoaki Shimada

出版者

The Society of Physical Therapy Science

雑誌

Journal of Physical Therapy Science (ISSN:09155287)

巻号頁・発行日

vol.22, no.1, pp.11-16, 2010 (Released:2010-03-19)

参考文献数

28

被引用文献数

5 5

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[Purpose] In general, people with bilateral osteoarthritis descend stairs sideways or backwards as compensatory movements. However, to the best of our knowledge, no studies have investigated these movements. The objective of the present study was to ascertain the effects of descending forwards and descending backwards on kinetic changes in the knee joint, to ascertain the optimal stair descending method for minimizing stress on the knee joint. [Subjects] Subjects were 30 adult women with no orthopedic or neurological disorders. [Methods] With step heights (riser heights) of 10, 15, 20 and 25 cm, changes in knee flexion angle, extension moment and joint force were measured when descending forwards and descending backwards using a three dimensional motion analysis system. [Results] Peak knee flexion angle, peak knee extension moment and peak knee joint forces observed in descending stairs backwards were smaller than those in the descending forwards action. [Conclusion] The present results suggest that descending stairs backwards for osteoarthritis patients is effective in protecting the knees, alleviating pain and acquiring compensatory movements.