Document Detail


Manual wheelchair propulsion: effects of power output on physiology and technique.
MedLine Citation:
PMID:  2963939     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Eight wheelchair sportsmen conducted eight wheelchair exercise tests on a treadmill. Two workload strategies were followed: strategy 1--increments in speed at a constant slope and strategy 2--increments in slope at constant velocity. Thus, data on cardio-respiratory and propulsion technique parameters were obtained on two identical series of 16 speed and slope combinations. Between each two identical speed and slope combinations of strategies 1 and 2, a different workload history is apparent. A four-factor analysis of variance with repeated measures on the factors "strategy" (workload history), "speed," and "slope" was applied (P less than 0.05). No "strategy" effect was seen in the cardio-respiratory parameters (gross mechanical efficiency, ventilation, oxygen consumption, and heart rate), work/cycle, and cycle time. Thus, within the experimental set-up, workload history did not affect the parameters studied and 3-min workload periods appeared sufficiently long for experienced wheelchair users to adapt to the requirements of a given speed and slope combination. Significant effects were found on "speed," "slope," and their interaction in all parameters tested. Moreover, a comparison of two equal levels of power output, but different speed and slope, led to a significantly higher efficiency, cycle time, and work per cycle for the "low speed and high slope" combination. Push time and recovery time appeared highly dependent on speed and slope, respectively. The findings indicate that propulsion technique and cardio-respiratory parameters should not merely be studied in relation to power output, but also with respect to its constituents, speed, and slope/resistance.
Authors:
L H van der Woude; K M Hendrich; H E Veeger; G J van Ingen Schenau; R H Rozendal; G de Groot; A P Hollander
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  20     ISSN:  0195-9131     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  1988 Feb 
Date Detail:
Created Date:  1988-03-25     Completed Date:  1988-03-25     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  70-8     Citation Subset:  IM; S    
Affiliation:
Department of Functional Anatomy, Faculty of Human Movement Sciences, Free University, Amsterdam, The Netherlands.
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MeSH Terms
Descriptor/Qualifier:
Adult
Disabled Persons*
Energy Metabolism
Exercise Test / methods
Heart Rate*
Humans
Male
Physical Exertion*
Respiration*
Sports
Wheelchairs*

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


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