Document Detail


Mechanical advantage in wheelchair lever propulsion: effect on physical strain and efficiency.
MedLine Citation:
PMID:  9239621     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In this experimental study on a prototype lever-propelled wheelchair, the effect of a range of mechanical advantages (MA) on physical strain, oxygen uptake, energy cost, mechanical efficiency, stroke frequency and perceived exertion was examined. Nine out of 10 male nonwheelchair users successfully performed five submaximal tests on a motor-driven treadmill in a prototype bi-manual asynchronous lever-propelled tricycle. Each test contained the same protocol, but made use of one of the five different MAs. In every test the inclination level increased by 1% every third minute, starting on 0% up to 3%. The velocity was kept constant at 0.97 m.s-1. Variables measured included oxygen uptake, minute ventilation, respiratory exchange ratio, heart rate, and stroke frequency. Analysis for repeated measures was conducted on the main factors slope and MA and their interaction. Additional analysis include a multiple regression analysis. All statistics were conducted with a p < 0.05 level of significance. MA had a significant effect (p < 0.05) on oxygen uptake, energy cost, mechanical efficiency, and stroke frequency. These results suggest that the implementation of a range of MAs on a lever-propelled wheelchair may accommodate different external conditions (slope, climatic, surface conditions, sports, and recreational conditions) and different user groups more readily. This may improve the social radius of action and freedom of mobility of individuals confined to wheelchairs.
Authors:
L H van der Woude; E Botden; I Vriend; D Veeger
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of rehabilitation research and development     Volume:  34     ISSN:  0748-7711     ISO Abbreviation:  J Rehabil Res Dev     Publication Date:  1997 Jul 
Date Detail:
Created Date:  1997-09-11     Completed Date:  1997-09-11     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8410047     Medline TA:  J Rehabil Res Dev     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  286-94     Citation Subset:  IM    
Affiliation:
Institute for Fundamental and Clinical Human Movement Sciences, Faculty of Human Movement Sciences, Vrije Universiteit, Amsterdam, The Netherlands. L_H_V_van_der_Woude@FBW.VU.NL
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MeSH Terms
Descriptor/Qualifier:
Adult
Biomechanics
Climate
Energy Metabolism / physiology*
Equipment Design
Evaluation Studies as Topic
Exercise Test
Humans
Locomotion / physiology*
Male
Multivariate Analysis
Oxygen Consumption / physiology*
Physical Exertion / physiology*
Regression Analysis
Surface Properties
Wheelchairs / standards*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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