Metabolic responses to various combinations of gradient, load and marching speed

Todd, A.I. and Scott, P.A. (2002) Metabolic responses to various combinations of gradient, load and marching speed. Ergonomics SA : Journal of the Ergonomics Society of South Africa, 14 (1). pp. 37-45. ISSN 1010-2728




Objective. This study examined the metabolic cost of South African soldiers carrying loads under various conditions of gradient and marching speed. Thirty-two male soldiers participated in the study. Three speed and load combinations, 4, 5 and 6 km.h[superscript (-1)] carrying of 50, 35 and 20 kg respectively, were imposed, on each of three gradients: -10%, 0% and +10%; a total of nine experimental conditions. Subjects wore standardized military uniforms and breathed into a portable ergospirometer (Metamax) for the duration of each condition. Subjects were required to march for six minutes under each condition, and metabolic responses were monitored during the third and sixth minute of each condition. The metabolic responses to the three level marching conditions showed no significant differences. Marching uphill resulted in a significant increase in metabolic demands under all three speed and load onditions. Downhill marching elicited significant decreases only under the two lighter load conditions. Downhill marching with heavy loads appears to show no reduction in metabolic demands placed on soldiers.

Item Type:Article
Uncontrolled Keywords:load; speed and gradient; adjustments; metabolic cost; metabolic demand; metabolic response; marching speed
Subjects:Y Unknown > Subjects to be assigned
Divisions:Faculty > Faculty of Science > Human Kinetics & Ergonomics
ID Code:666
Deposited On:10 May 2007
Last Modified:06 Jan 2012 16:18
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