Document Detail


Evaluation of the cushion setting on performance of a Biodex II dynamometer.
MedLine Citation:
PMID:  10084449     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVES: To compare the effects of the soft cushion setting with those of the hard cushion setting of a Biodex II isokinetic dynamometer on peak velocity and peak torque with six loads at 23 preset speeds. DESIGN: Mixed within- and between-groups, repeated-measures design. SETTING: Research laboratory of a physical therapy education program. INTERVENTIONS: Each load was strapped onto the right knee attachment of the dynamometer and was dropped through a 100 degrees arc of motion five times at each preset speed using the soft and hard cushion settings. MAIN OUTCOME MEASURES: Peak velocity, peak torque, time to peak velocity, time to peak torque. RESULTS: Peak velocity was significantly influenced by the cushion setting, the weight dropped, and the preset speed. Maximal peak velocity achieved was 400 degrees/sec. Peak torque was influenced significantly by the cushion setting, the load, and the preset speed. Maximal peak torque measured was 34.99 kg-m. CONCLUSION: The rotating shaft of Biodex II dynamometer moved at a slower speed through the entire arc of motion at the soft cushion setting and often failed to achieve a constant, preset speed. Peak torque measured using the soft cushion setting was more variable and therefore questionable.
Authors:
W Ling; F C Chen; A L McDonough
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Archives of physical medicine and rehabilitation     Volume:  80     ISSN:  0003-9993     ISO Abbreviation:  Arch Phys Med Rehabil     Publication Date:  1999 Mar 
Date Detail:
Created Date:  1999-03-29     Completed Date:  1999-03-29     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  2985158R     Medline TA:  Arch Phys Med Rehabil     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  350-4     Citation Subset:  AIM; IM    
Affiliation:
Department of Physical Therapy, New York University, NY 10010, USA.
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MeSH Terms
Descriptor/Qualifier:
Equipment Design
Humans
Isometric Contraction / physiology
Knee / physiology
Physical Therapy Modalities / instrumentation*
Sensitivity and Specificity
Weight-Bearing / physiology

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