歩行と走行のエネルギーを分割する:四肢の振動は高価です
Richard L Marsh1, David J Ellerby, Jennifer A Carr
1Department of Biology, Northeastern University, 360 Huntington Avenue, Boston, MA 02115, USA. r.marsh@neu.edu
Science (New York, N.Y.)
|January 6, 2004
まとめ
歩行と走行における四肢のエネルギー使用を理解することは鍵です. 後肢の筋肉は,スウィングフェーズ筋肉が26%,スタンスフェーズ筋肉が74%のエネルギーを使うことで,重要なエネルギーを占めています.
科学分野:
- バイオメカニクス バイオメカニクス
- 動物の移動 動物の移動
- 骨格筋のエネルギーは,
背景:
- 移動のエネルギーコストを理解することは,生体力学の研究において極めて重要です.
- 以前のモデルでは,歩行や走行中の筋肉間のエネルギー分布に関する詳細な情報が欠けていました.
研究 の 目的:
- 移動中に異なる筋肉群のエネルギー消費量を定量化するために.
- スイング・フェーズとスタンス・フェーズの筋肉が,全体的な肢体エネルギーに与える貢献度を測定する.
主な方法:
- ミツバチをモデル生物として利用した.
- 後肢の筋肉の血流を測定し,代謝率とエネルギー消費のプロキシとして使用した.
- スイング・フェーズとスタンス・フェーズの筋肉の間のエネルギー分布を評価した.
主要な成果:
- スイング・フェーズの筋肉は,推定26%の肢体エネルギーを消費します.
- 姿勢相の筋肉は,残りの74%の肢体エネルギーを占めています.
- この分布は,異なる速度で一貫したままでした.
結論:
- 足肢の振動は,地上での移動中に相当な量のエネルギーを必要とします.
- この発見は,足の動きにおけるエネルギー分配に関する以前の仮定に異議を唱えている.
- 走行エネルギーの正確なモデルには,詳細な筋肉特有のエネルギーデータが必要です.
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