Document Detail


Critical power can be estimated from nonexhaustive tests based on rating of perceived exertion responses.
MedLine Citation:
PMID:  18438218     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The purpose of this study was to evaluate a novel procedure, based on the perceived exertion threshold (PET) concept, involving non-exhaustive tests (PET14-17) to estimate critical power (CP), as well as to examine the reproducibility of these indices. Twenty young men performed 2 trials (Trial 1 and Trial 2) of 4 exhaustive predictive tests to estimate CP, PET, and PET14-17. The slope coefficients of the regression lines corresponding to the ratings of perceived exertion (RPE) versus time relationship (y axis) obtained during the predictive tests were plotted against the power outputs (x axis) to estimate PET. PET was calculated as the intersection point of the regression line in the power axis. The 14-17 RPE range of each predictive test was modeled using the same mathematical procedures used to estimate PET14-17. CP was derived from the power-time hyperbolic equation. Analysis of variance revealed no significant differences among CP (189-194 W), PET (190-191 W) and PET14-17, (191-195 W). The correlations between CP and PET (r = 0.87), CP and PET14-17 (r = 0.89), and PET and PET14-17 (r = 0.88) were all strong. Additionally, the bias +/- limits of agreement when plotting CP and PET was -2.16 +/- 31.60 W, and -5.70 +/- 31.21 W when comparing CP and PET14-17. Relatively high reproducibility levels of CP (ICC = 0.96), PET (ICC = 0.85) and PET14-17 (ICC = 0.83) were recorded in the test-retest fashion. It can be concluded that the PET14-17 can be utilized with relatively high accuracy and reproducibility to estimate CP without causing exhaustion in the subjects.
Authors:
Fábio Y Nakamura; Nilo M Okuno; Luiz A B Perandini; Lúcio F S Caldeira; Herbert G Simões; Jefferson R Cardoso; David J Bishop
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  22     ISSN:  1533-4287     ISO Abbreviation:  J Strength Cond Res     Publication Date:  2008 May 
Date Detail:
Created Date:  2008-06-06     Completed Date:  2008-08-07     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  9415084     Medline TA:  J Strength Cond Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  937-43     Citation Subset:  IM    
Affiliation:
Universidade Estadual de Londrina, Paraná, Brazil. fabioy_nakamura@yahoo.com.br
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MeSH Terms
Descriptor/Qualifier:
Adult
Biomechanics
Energy Metabolism / physiology
Ergometry
Exercise Test / methods*
Exercise Tolerance / physiology*
Humans
Linear Models
Male
Muscle Contraction / physiology
Muscle Fatigue
Physical Endurance / physiology
Physical Exertion / physiology*
Predictive Value of Tests
Probability
Time Factors
Torque

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


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