Document Detail


Effect of stepping rate on energy costs during StairMaster exercise.
MedLine Citation:
PMID:  8455454     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The responses to a self-selected stepping pattern (random) on a StairMaster 4000PT were compared with those obtained in response to the rates established by the manufacturer (cadence) in men (N = 14) and women (N = 14). During the random test the subjects stepped at their own natural, self-selected rate and distance. In cadence trial the subjects were required to step in time with a metronome at a predetermined rates of 60, 77, 95, and 112 steps.min-1. Each trial consisted of four, 5-min continuous workloads during which HRs were recorded and expired air was analyzed using an automated open-circuit gas system each minute. All size dependent variables (i.e., VE and lO2.min-1) as well as relative VO2 (mlO2.kg-1.min-1) were significantly (P < 0.01) higher for the men across all stages and between methods. Although the random test produced slightly higher oxygen consumption values than the cadence trial, these differences were not significant (P > 0.05). The actual METs were significantly (P < 0.01) higher at all stages except at the lowest stepping rate for both methods compared with those estimated by the manufacturer. Equations were established to estimate actual MET costs: Men's METs = 2.675 + 0.935 (rate); women's METs = 2.934 + 0.817 (rate). Cross-validations of 0.975 and 0.957 were obtained on an additional group of men (N = 8) and women (N = 11), respectively.
Authors:
N K Butts; C Dodge; M McAlpine
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  25     ISSN:  0195-9131     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  1993 Mar 
Date Detail:
Created Date:  1993-04-20     Completed Date:  1993-04-20     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:  378-82     Citation Subset:  IM; S    
Affiliation:
Human Performance Laboratory, University of Wisconsin-LaCrosse, WI 54601.
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MeSH Terms
Descriptor/Qualifier:
Adult
Analysis of Variance
Breath Tests
Calorimetry, Indirect
Energy Metabolism*
Ergometry
Exercise / physiology*
Exercise Test / instrumentation,  methods*
Female
Heart Rate / physiology*
Humans
Male
Oxygen Consumption / physiology*
Physical Exertion / physiology
Pulmonary Gas Exchange / physiology
Sex Factors
Time Factors

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


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