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The DOI matches its Crossref record; 2 of the 2 references it cites were found in a registry or an index.

Metabolic cost of generating muscular force in human walking: insights from load-carrying and speed experiments

Griffin, Timothy M., Roberts, Thomas J., Kram, Rodger·2003·Journal of Applied Physiology
DOI 10.1152/japplphysiol.00944.2002
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Abstract

We sought to understand how leg muscle function determines the metabolic cost of walking. We first indirectly assessed the metabolic cost of swinging the legs and then examined the cost of generating muscular force during the stance phase. Four men and four women walked at 0.5, 1.0, 1.5, and 2.0 m/s carrying loads equal to 0, 10, 20, and 30% body mass positioned symmetrically about the waist. The net metabolic rate increased in nearly direct proportion to the external mechanical power during moderate-speed (0.5–1.5 m/s) load carrying, suggesting that the cost of swinging the legs is relatively small. The active muscle volume required to generate force on the ground and the rate of generating this force accounted for >85% of the increase in net metabolic rate across moderate speeds and most loading conditions. Although these factors explained less of the increase in metabolic rate between 1.5 and 2.0 m/s (∼50%), the cost of generating force per unit volume of active muscle [i.e., the cost coefficient ( k)] was similar across all conditions [ k = 0.11 ± 0.03 (SD) J/cm 3]. These data indicate that, regardless of the work muscles do, the metabolic cost of walking can be largely explained by the cost of generating muscular force during the stance phase.

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Crossref · 10.1152/japplphysiol.00944.2002

Cites

2 of 2 references verified0 citation errors · 0 not checkable

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  • Many investigations under level-only conditions have reported that, on a per kilogram basis, each unit of additional torso mass incurs a relatively greater metabolic cost than each kilogram of body mass.

    “Many investigations under level-only conditions have reported that, on a per kilogram basis, each unit of additional torso mass incurs a relatively greater metabolic cost than each kilogram of body mass (6, 29 -31, 37).”

    From Walking economy is predictably determined by speed, grade, and gravitational load. (2017) · cites this paper as [31]

  • The Wb/tc approach was successfully applied to level human walking by Hoyt et al., who expressed rate of ground force application in terms of body weight and time of foot-ground contact, but has been explored only limitedly since.

    “The approach was successfully applied to level human walking by Hoyt et al. (36), who expressed rate of ground force application in terms of body weight and time of foot-ground contact (W b /t c ), but has been explored only limitedly since (31).”

    From Walking economy is predictably determined by speed, grade, and gravitational load. (2017) · cites this paper as [31]

  • Load weight should remain at 30% of a person's body mass.

    “While this estimate is well below the approximate timber carrying load given by Chaco researchers, it is above other study estimates regarding load-capacity and energy expenditure (Griffin, Roberts & Kram 2003), which contend that load weight should remain at 30% of a person’s body mass.”

    From A least cost analysis: correlative modeling of the chaco regional road system (2019) · cites this paper as Griffin, Roberts & Kram 2003

  • Other study estimates regarding load-capacity and energy expenditure contend that load weight should remain at 30% of a person's body mass.

    “it is above other study estimates regarding load-capacity and energy expenditure”

    From A least cost analysis: correlative modeling of the chaco regional road system (2019) · cites this paper as Griffin, Roberts & Kram 2003

Citations

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Metadata

Authors
Griffin, T. M., Roberts, T. J., & Kram, R.
Venue
Journal of Applied Physiology
Publisher
American Physiological Society
Published
2003-07
Volume
95
Issue
1
Pages
172-183
ISSN
  • 8750-7587
  • 1522-1601
DOI
10.1152/japplphysiol.00944.2002
Cited by
251
References
2
Language
en

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