Influence of fatigue time and level on increases in postural sway

Authors: Pline, Kevin M.¹; Madigan, Michael L.²; Nussbaum, Maury A.²

Source: Ergonomics, Volume 49, Number 15, 15 December 2006 , pp. 1639-1648(10)

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Abstract:

<p>The purpose of this study was to investigate the influence of fatigue time and fatigue level on the increases in postural sway during quiet standing. Centre of pressure-based measures of postural sway were collected both before and after fatiguing participants using three different fatigue levels and two different fatigue times. Results showed increasing fatigue time increased sway velocity and sway area, and increasing fatigue level increased sway velocity. Fatigue time effects are important to consider when applying laboratory-based findings to the field given that the fatigue time can differ substantially between the two. Fatigue level effects imply a doseÂâ-“Âresponse relationship between localized muscle fatigue and risk of falling that can have important implications in work/rest cycle scheduling for occupations at risk of injurious falls.</p>

Keywords: Accidental falls; Muscle fatigue; Postural balance

Document Type: Research article

DOI: http://dx.doi.org/10.1080/00140130600901678

Affiliations: 1: Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, Mail Code 0238, Blacksburg, VA, 24061, USA 2: Virginia TechÂâ-“ÂWake Forest School of Biomedical Engineering and Sciences, Virginia Polytechnic Institute and State University, Mail Code 0298, Blacksburg, VA, 24061, USA

Publication date: 2006-12-15

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