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Minimum oxygen cost of human walking with geometrically similar leg movements
http://hdl.handle.net/10173/741
http://hdl.handle.net/10173/7415d1892b2-afcf-4237-b085-1a0cbad639fc
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
TR_30_1_113.pdf (3.3 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2011-10-18 | |||||
| タイトル | ||||||
| タイトル | Minimum oxygen cost of human walking with geometrically similar leg movements | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Metabolic cost | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Optimal walking | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Optimal speed | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Step length | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Step rate | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Strouhal number | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 著者 |
Takahashi, Tatsuhisa
× Takahashi, Tatsuhisa× Yanagida, Hirotaka× Wang, Shuoyu× Matsuo, Takashi× Okada, Akiyoshi× Kuwayama, Takashi× Natsui, Junich |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The mechanism by which the expenditure of oxygen to walk per unit distance at an intermediate speed is minimized, by definition optimal walking, was investigated to characterize optimal walking in humans with variations in individual walking speeds. Oxygen uptake and step rate（SR）were measured among 7 young male subjects walking at an increasing speed from 16.7 to 131.7 m min−1 with 5 m min−1 increments every 1 min on a level treadmill. Measurements of leg length（L）were also made and step length（SL）was calculated by dividing walking speed by SR. The hip joint angle（θ）was calculated as a function of both L and SL such that θ＝2sin−［1 SL（／ 2L）］ deduced from a mathematical geometrically similar model of pendulum−like legs. The minimum oxygen cost to walk per unit distance for each subject was observed over a wide range of speeds from 60 to 100 m min−1.However, the oxygen cost of walking for all the subjects was minimized during a step cycle through a hip−joint angle of about 46 deg in the astride position, regardless of L. The stifflegged model demonstrated that the pathway of the trunk during optimal walking with a swing leg angle of 46 deg was approximately maintained at an even level by the counteracting effects of the leg decline and the heel rise. These results suggest that the minimum oxygen cost of transport during optimal walking was achieved by the mechanism underlying the maximum interchange between the gravitational−potential and kinetic energy for the body with an even level of the trunk that reduces extra muscular work needed against internal and external resistance, as well as against gravity | |||||
| 書誌情報 |
Therapeutic research 巻 30, 号 1, p. 113-124, 発行日 2009-01-20 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0289-8020 | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AN10043845 | |||||
| 著者版フラグ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| 出版者 | ||||||
| 出版者 | Life Science Publishing | |||||
