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- Abe Daijiro
- Biodynamics Laboratory, Center for Health and Sports Science, Kyushu Sangyo University
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- Fukuoka Yoshiyuki
- Faculty of Health and Sports Science, Doshisha University
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- Muraki Satoshi
- Faculty of Design, Kyushu University
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- Yasukouchi Akira
- Faculty of Design, Kyushu University
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- Sakaguchi Yasushi
- Chugoku Electric Power Co., Ltd.
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- Niihata Shigemitsu
- Professor Emeritus, Hiroshima University
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This study quantified the interaction of electromyography (EMG) obtained from the vastus lateralis and metabolic energy cost of running (Cr; mL·[mass+load]−1·meter−1), an index of running economy, during submaximal treadmill running. Experiments were conducted with and without load on the back on a motor-driven treadmill on the downhill, level and uphill slopes. The obtained EMG was full-wave rectified and integrated (iEMG). The iEMG was divided into eccentric (ECC) and concentric (CON) phases with a foot sensor and a knee-joint goniometer. The ratio of ECC to CON (ECC/CON ratio) was regarded as the muscle elastic capacity during running on each slope. The Cr was determined as the ratio of the 2-min steady-state VO2 to the running speed. We found a significant decrease in the Cr when carrying the load at all slopes. The ECC/CON ratio was significantly higher in the load condition at the downhill and level slopes, but not at the uphill slope. A significant gradient difference was observed in the Cr (down<level<up) and ECC/CON ratio (down=level>uphill). Thus, an alteration of Cr by the gradient and load was almost consistent with that of the ECC/CON ratio. The ECC/CON ratio, but not the rotative torque (T) functioning around the center of body mass, significantly correlated with Cr (r=−0.41, p<0.05). These results indicated that the ECC/CON ratio, rather than T, contributed to one of the energy-saving mechanisms during running with load.
収録刊行物
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- Journal of PHYSIOLOGICAL ANTHROPOLOGY
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Journal of PHYSIOLOGICAL ANTHROPOLOGY 30 (4), 153-160, 2011
日本生理人類学会
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詳細情報 詳細情報について
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- CRID
- 1390001205255048960
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- NII論文ID
- 10029137383
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- NII書誌ID
- AA12113950
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- COI
- 1:STN:280:DC%2BC3Mjis1Wluw%3D%3D
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- ISSN
- 18806805
- 18806791
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- PubMed
- 21804298
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- PubMed
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可