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Please use this identifier to cite or link to this item: http://hdl.handle.net/10373/623

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Title: The Extra Load Index as a method for comparing the relative economy of load carriage systems
Authors: Lloyd, Ray
Hind, Karen
Parr, Bridget
Davies, Simeon
Cooke, Carlton
Affiliation: University of Abertay Dundee. School of Social & Health Sciences
Keywords: Anthropometry
Ergonomics tools and methods
Physiology
Product design
Issue Date: Dec-2010
Publisher: Taylor & Francis
Type: Journal Article
Refereed: peer-reviewed
Rights: This is the author's final version of this article. Published version (c)Taylor & Francis, available from http://www.informaworld.com at http://dx.doi.org/10.1080/00140139.2010.528454
Citation: Lloyd, R., et al. 2010. The Extra Load Index as a method for comparing the relative economy of load carriage systems. Ergonomics. 53(12): pp.1500-1504. Available from http://dx.doi.org/10.1080/00140139.2010.528454
Abstract: The Extra Load Index (ELI) has been proposed as a suitable method of assessing the relative economy of load carriage systems. The purpose of this study was to determine, based on empirical evidence, that the ELI can accommodate variations in both body composition and added load. In total, 30 women walked carrying loads of up to 70% body mass at self-selected walking speeds whilst expired air was collected. In addition, each of the women had body composition assessed via dual energy X-ray absorptiometry. Results show that the ELI is independent of body composition variables, the magnitude of additional loads and the speed of progression. Consequently, it is suggested that it represents an appropriate method of comparing load carriage systems in both scientific and commercial arenas. Statement of Relevance:This paper demonstrates that ELI is independent of body composition, added load and speed and is therefore an appropriate method to generalise comparisons of load carriage systems. It has the advantage of being easily understood by manufacturers and consumers whilst retaining appropriate scientific precision.
URI: http://hdl.handle.net/10373/623
ISSN: 0014-0139
Appears in Collections:Social & Health Sciences Collection

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