Document Detail


Spontaneously chosen crank rate variations in submaximal arm exercise with inexperienced subjects. Effects on cardiorespiratory and efficiency parameters.
MedLine Citation:
PMID:  11842359     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The aim of the present study was to compare the physiological responses during arm exercises when the crank rate was chosen spontaneously (TS) or set at +/- 20 % (T-20, T+ 20) of the spontaneously chosen crank rate (SCCR). Eight physical education male students, aged 22 +/- 3.2 years, performed an upper body exercise in which intensities ranged from unload to 80 % of maximal power. No significant difference was observed in oxygen uptake, ventilation, gross and net efficiency values between TS and T+ 20 or T-20. Nevertheless, oxygen uptake and ventilation were significantly (p < 0.05) lower and gross and net efficiencies higher (p < 0.05) during T-20 than T+ 20. No significant difference was noticed for heart rate, delta and work efficiency between TS, T-20 and T+ 20. The hypothesis that SCCR is the most economical one according to the efficiency parameters was not quite verified. However, crank rates lower than SCCR could be interesting because they increase gross efficiency compared to higher crank rates. Moreover, the selection of crank rates depends on power output. Indeed, SCCR increased significantly (p < 0.05) with power output. In the physical reconditioning of injured or handicapped subjects, the latter are very sensitive to the power output, and the crank rate could be another constraint.
Authors:
G Marais; L Dupont; M Maillet; T Weissland; J Vanvelcenaher; P Pelayo
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  International journal of sports medicine     Volume:  23     ISSN:  0172-4622     ISO Abbreviation:  Int J Sports Med     Publication Date:  2002 Feb 
Date Detail:
Created Date:  2002-02-13     Completed Date:  2002-04-25     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8008349     Medline TA:  Int J Sports Med     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  120-4     Citation Subset:  IM    
Affiliation:
Laboratoire d'Etudes de la Motricité Humaine, Faculté des Sciences du Sport et de l'Education Physique, Université de Lille 2, 9 rue de l'université, 59790 Ronchin, France. gmarais@hp-sc.univ-lille2.fr
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MeSH Terms
Descriptor/Qualifier:
Adult
Analysis of Variance
Arm / physiology*
Biomechanics
Exercise / physiology*
Exercise Test
Heart Rate / physiology
Humans
Linear Models
Male
Oxygen Consumption / physiology
Respiratory Mechanics / physiology

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


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