期刊
BIOLOGY LETTERS
卷 10, 期 1, 页码 -出版社
ROYAL SOC
DOI: 10.1098/rsbl.2013.1006
关键词
legged locomotion; walking; metabolic energy cost; optimality; minimization; mathematical model
资金
- NSF [CMMI-1254842, CMMI-1300655]
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1300655] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1254842] Funding Source: National Science Foundation
When humans wish to move sideways, they almost never walk sideways, except for a step or two; they usually turn and walk facing forward. Here, we show that the experimental metabolic cost of walking sideways, per unit distance, is over three times that of forward walking. We explain this high metabolic cost with a simple mathematical model; sideways walking is expensive because it involves repeated starting and stopping. When walking sideways, our subjects preferred a low natural speed, averaging 0.575 m s(-1) (0.123 s.d.). Even with no prior practice, this preferred sideways walking speed is close to the metabolically optimal speed, averaging 0.610 m s(-1) (0.064 s.d.). Subjects were within 2.4% of their optimal metabolic cost per distance. Thus, we argue that sideways walking is avoided because it is expensive and slow, and it is slow because the optimal speed is low, not because humans cannot move sideways fast.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据