Partitioning the Energetics of Walking and Running: Swinging the Limbs Is Expensive
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- Richard L. Marsh
- Department of Biology, Northeastern University, 360 Huntington Avenue, Boston, MA 02115, USA.
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- David J. Ellerby
- Department of Biology, Northeastern University, 360 Huntington Avenue, Boston, MA 02115, USA.
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- Jennifer A. Carr
- Department of Biology, Northeastern University, 360 Huntington Avenue, Boston, MA 02115, USA.
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- Havalee T. Henry
- Department of Biology, Northeastern University, 360 Huntington Avenue, Boston, MA 02115, USA.
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- Cindy I. Buchanan
- Department of Biology, Northeastern University, 360 Huntington Avenue, Boston, MA 02115, USA.
書誌事項
- 公開日
- 2004-01-02
- DOI
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- 10.1126/science.1090704
- 公開者
- American Association for the Advancement of Science (AAAS)
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説明
<jats:p>Explaining the energetics of walking and running has been difficult because the distribution of energy use among individual muscles has not been known. We estimated energy use by measuring blood flow to the hindlimb muscles in guinea fowl. Blood flow to skeletal muscles is controlled locally and varies directly with metabolic rate. We estimate that the swing-phase muscles consume 26% of the energy used by the limbs and the stance-phase muscles consume the remaining 74%, independent of speed. Thus, contrary to some previous suggestions, swinging the limbs requires an appreciable fraction of the energy used during terrestrial legged locomotion. Models integrating the energetics and mechanics of running will benefit from more detailed information on the distribution of energy use by the muscles.</jats:p>
収録刊行物
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- Science
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Science 303 (5654), 80-83, 2004-01-02
American Association for the Advancement of Science (AAAS)
