期刊
JOURNAL OF THEORETICAL BIOLOGY
卷 209, 期 4, 页码 445-453出版社
ACADEMIC PRESS LTD
DOI: 10.1006/jtbi.2001.2279
关键词
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A person constrained to walk at a given speed v on a treadmill, chooses a particular step frequency f and step length d = v/f. Testing over a range of speeds generates a speed-frequency (v-f) relationship. This relationship is commonly posited as a basic feature of human gait. It is often further posited that this curve follows from minimum energy cost strategy. We observed that individuals walking under different constraint circumstances-walking to a range of fixed metronome frequencies (fixed f) or over a range of spaced markers (fixed d)-produce speed-frequency relations distinct from the constrained v relation. We show here that three distinct speed-frequency curves, similar to those observed, are predicted by the assumption that a walking person optimizes an underlying objective function F(v,f) that has a minimum at the preferred gait. Further, the metabolic cost of transport is a reasonable approximate candidate for the function F. (C) 2001 Academic Press.
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