Document Detail


Reliability Analysis of the 3-min All-Out Exercise Test for Cycle Ergometry.
MedLine Citation:
PMID:  21606865     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The 3-min all-out exercise test (3 MT) is purported to estimate critical power (CP), anaerobic work capacity (W'), and serve as an exercise mode for measuring maximum oxygen uptake (VO2max). Reliability analysis of the 3 MT has been confined to CP not W' and verification of 'true' VO2max was exclusive to a graded exercise test (GXT). PURPOSE:: We conducted a reliability analysis of the 3 MT and compared VO2max values from the 3 MT with a GXT and exhaustive, square-wave verification bout. METHODS:: Upon completion of a custom GXT and square-wave, verification protocol, 11 subjects of various aerobic powers completed two 3 MTs (separate visits). CP, W', average power over 150 s from the 3 MT, and VO2max values were assessed using typical error (TE), coefficient of variation (CV) and intraclass correlation (α). RESULTS:: CP (W) (Trial 1: 206 ± 47; Trial 2: 206 ± 42) did not differ between 3 MT trials (p = 0.37) and was reliable (TE = 15 W, CV = 7%, α = 0.93). W' was less reliable (TE = 2864 J, CV = 28%, α = 0.76); but, did not alter power-duration estimates from the two 3 MTs (P > 0.05). Variability for VO2max (TE = ml·kg·min) between the GXT and verification bout (1.16) was more consistent than the first (2.03) or second (2.69) 3 MT. CONCLUSION:: The 3 MT yields reliable estimates CP and consistent estimates of power-duration relationship. Power for 150 s, in comparison to W', is a more reliable metric of short term power performance. The square-wave protocol is recommended over the 3 MT for verifying 'true' VO2max.
Authors:
Tyler M Johnson; Patrick J Sexton; Ashley M Placek; Steven R Murray; Robert W Pettitt
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-5-20
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  -     ISSN:  1530-0315     ISO Abbreviation:  -     Publication Date:  2011 May 
Date Detail:
Created Date:  2011-5-24     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
11Viola Holbrook Human Performance Laboratory, Minnesota State University, Mankato 2Department of Kinesiology, Mesa State College.
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