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Energy Cost and Mechanical Work of Walking during Load Carriage in Soldiers

GRENIER, JORDANE G., PEYROT, NICOLAS, CASTELLS, JOSIANE, OULLION, ROGER, MESSONNIER, LAURENT, MORIN, JEAN-BENOIT·2012·Medicine & Science in Sports & Exercise
DOI 10.1249/mss.0b013e3182456057
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Abstract

Unlabelled In the military context, soldiers carry equipments of total mass often exceeding 30%-40% of their body mass (BM) and complexly distributed around their body (backpack, weapons, electronics, protections, etc.), which represents severe load carrying conditions. Purpose This study aimed to better understand the effects of load carriage on walking energetics and mechanics during military-type walking. Methods Ten male infantrymen recently retired from the French Foreign Legion performed 3-min walking trials at a constant speed of 4 km·h(-1) on an instrumented treadmill, during which walking pattern spatiotemporal parameters, energy cost (C(W)), external mechanical work (W(ext)), and the work done by one leg against the other during the double-contact period (W(int,dc)) were specifically assessed. Three conditions were tested: (i) light sportswear (SP, reference condition considered as unloaded), (ii) battle equipment (BT, ∼22 kg, ∼27% of subjects' BM, corresponding to a military intermediate load), and (iii) road march equipment (RM, ∼38 kg, ∼46% of subjects' BM, corresponding to a military high load). Results Repeated-measures ANOVA showed that military equipment carriage significantly (i) altered the spatiotemporal pattern of walking (all P Conclusions Military equipments carriage induced significant changes in walking mechanics and energetics, but these effects appeared not greater than those reported with loads carried around the waist and close to the center of ma…

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  • It is unresolved whether the per kilogram metabolic costs of body mass vs. external mass affixed to the torso are equal.

    “Similarly unresolved is whether the per kilogram metabolic costs of body mass vs. external mass affixed to the torso are equal (6,26,30,37,45,51,58,67).”

    From Walking economy is predictably determined by speed, grade, and gravitational load. (2017) · cites this paper as [30]

  • 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 [30]

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Research works printed but not linked: 37

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Metadata

Authors
GRENIER, J. G., PEYROT, N., CASTELLS, J., OULLION, R., MESSONNIER, L., & MORIN, J.-B.
Venue
Medicine & Science in Sports & Exercise
Publisher
Ovid Technologies (Wolters Kluwer Health)
Published
2012-06
Volume
44
Issue
6
Pages
1131-1140
ISSN
0195-9131
DOI
10.1249/mss.0b013e3182456057
Cited by
45
References
1
Language
en

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