著者

星川 秀利

出版者

Waseda University

巻号頁・発行日

2003-07

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制度:新 ; 文部省報告番号:乙1812号 ; 学位の種類:博士(人間科学) ; 授与年月日:2003/7/16 ; 早大学位記番号:新3624

著者

星川 秀利 藤本 浩志

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 C編 (ISSN:03875024)

巻号頁・発行日

vol.69, no.680, pp.1080-1085, 2003-04-25 (Released:2008-02-26)

参考文献数

12

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The purpose of this study is to investigate the influence of lower saddle height on the knee joint. Five healthy male pedal at 60 rpm against the work load of 100 and 200 W. Three saddle heights of 80, 90 and 100% of trochanteric leg height are selected in this study. During each trial, the position data of the right lower limb's joints by the video camera and the force data of the right pedal by the force sensor are measured. Using these data, the inverse dynamics analysis is done, and the following results are obtained. The peak link force acting on the knee joint and the peak knee extension moment do not indicate any change over the three saddle heights, however, the angles at their peak values shift to the knee flexion as the lower saddle height. These results indicate that the lower saddle would overload at the knee joint.

著者

赤羽 秀徳 青木 和夫 星川 秀利

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

体力科学 (ISSN:0039906X)

巻号頁・発行日

vol.53, no.2, pp.221-234, 2004-04-01 (Released:2010-09-30)

参考文献数

26

被引用文献数

1

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The purpose of this study was to examine the effects of ankle plantar and dorsal flexion on the lower extremities' dynamics and crank torque in pedaling movements. Twelve males (6 cyclists and 6 non-cyclists) pedaled at the rate of 90 and 120 rpm for a power output of 200W. Subjects were divided into two groups according to the different ankle movement patterns in one crank rotation. The first group (Gr1) showed a one time plantar and dorsal flexion movement in one rotation. The second group (Gr2) showed two plantar and dorsal flexion movements in one rotation. It was assumed that the exertion of positive plantar flexor power in the upstroke phase could provide the difference of the ankle movement patterns. The following results were shown in Gr2 as compared with Grl. 1) The positive crank torque time ratio was extended due to dorsal flexor torque produced near the top dead center. 2) Continuous muscle contraction of the same muscle was avoided and reduction in a burden was brought about due to plantar flexion in the upstroke phase. 3) Reduction of hip extensor torque was shown. These results suggest that two dorsal and plantar flexion movements in one rotation in pedaling could be a more effective pattern in terms of muscle work.

著者

沢崎 健太 星川 秀利 宮崎 彰吾 向野 義人

出版者

一般社団法人 日本プライマリ・ケア連合学会

雑誌

日本プライマリ・ケア連合学会誌 (ISSN:21852928)

巻号頁・発行日

vol.37, no.3, pp.260-264, 2014 (Released:2014-09-26)

参考文献数

14

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目的 : 非侵襲性の微細突起による皮膚刺激を用いて, 大学生の便秘に及ぼす影響を検討した.対象 : 便秘の事前調査を回収できた280名の内, 研究趣旨に同意が得られた17名とした.方法 : 微細突起を耳甲介腔に各自貼付するS群 (9名) とプラセボP群 (8名) を封筒法により無作為に割付け, 便秘 (CAS-J) , 体重, 体脂肪率, 血圧の評価を行った.結果 : S群では介入開始前と比較して研究終了後にCAS-Jが有意に低下 (P=0.02) したが, P群では有意な差はなかった. 両群共に体重, 体脂肪率, 血圧は研究終了後に有意差はみられなかった.結論 : 本研究は耳甲介腔への微細突起による非侵襲性の皮膚刺激が便秘の改善傾向, 特にセルフケアの一手段として活用できる可能性を示唆する.

著者

星川 秀利 木村 裕一 玉木 啓一 藤本 浩志 中村 好男 村岡 功

出版者

バイオメカニズム学会

雑誌

バイオメカニズム学会誌 (ISSN:02850885)

巻号頁・発行日

vol.17, no.3, pp.173-182, 1993-08-01 (Released:2016-10-31)

被引用文献数

1 2

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The purpose of this study was to investigate the influence of training level on indices of effectiveness (IE). Six male cyclists and non cyclists performed pedalling bouts for I minute using a cycle ergometer against the work load of 1 50, 200 and 250W. The subjects were directed to maintain 90 rpm of pedalling rate during the cycling bouts. Rotary encorders and triaxis force sensors were mounted on the ergometer for measuring crank angle, both pedal forces and both pedal angles. Using these data, the resultant pedal force (FR) and the force perpendicular component of the crank force (FE) were calculated. IE represents the ratio of the force component perpendicular to the crank to the appplied force to the pedals and was calculated by FR and FE . IE was not different between cyclist and non cyclist groups. On the other hand, peak FR during 250W was significantly lower in cyclists than non cyclists ( 344.9±37.6 [N] and 398.4±24.6 [N] respectively, p<0.05). Those results suggested that pedalling skill would be reflected by the lower pedalling force which was related with a reduction of negative force during up phase rather than its efficiency converting to effective torque.

著者

沢崎 健太 星川 秀利 宮崎 彰吾 向野 義人

出版者

一般社団法人 日本プライマリ・ケア連合学会

雑誌

日本プライマリ・ケア連合学会誌 (ISSN:21852928)

巻号頁・発行日

vol.37, no.3, pp.260-264, 2014

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<b>目的</b> : 非侵襲性の微細突起による皮膚刺激を用いて, 大学生の便秘に及ぼす影響を検討した.<br><b>対象</b> : 便秘の事前調査を回収できた280名の内, 研究趣旨に同意が得られた17名とした.<br><b>方法</b> : 微細突起を耳甲介腔に各自貼付するS群 (9名) とプラセボP群 (8名) を封筒法により無作為に割付け, 便秘 (CAS-J) , 体重, 体脂肪率, 血圧の評価を行った.<br><b>結果</b> : S群では介入開始前と比較して研究終了後にCAS-Jが有意に低下 (P=0.02) したが, P群では有意な差はなかった. 両群共に体重, 体脂肪率, 血圧は研究終了後に有意差はみられなかった.<br><b>結論</b> : 本研究は耳甲介腔への微細突起による非侵襲性の皮膚刺激が便秘の改善傾向, 特にセルフケアの一手段として活用できる可能性を示唆する.