Document Detail


Ventilatory efficiency in juvenile elite cyclists.
MedLine Citation:
PMID:  22840997     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
OBJECTIVES: Ventilation ( [Formula: see text] ) as a function of CO(2) output, and oxygen uptake ( [Formula: see text] ) as a function of [Formula: see text] , define cardio-respiratory efficiency, although few data compare efficiency with maximum oxygen uptake ( [Formula: see text] ), or consider reproducibility. Currently there are no data for trained juveniles. DESIGN: Twenty-five trained juvenile cyclists (mean age 14.7 years), performed maximal exercise testing on two occasions, separated by 16 weeks. METHODS: [Formula: see text] vs. [Formula: see text] slope, oxygen uptake efficiency slope, and [Formula: see text] were measured during cycle ergometer exercise to volitional exhaustion on two occasions, 16 weeks apart. RESULTS: Mean (SD) [Formula: see text] vs. [Formula: see text] slope, oxygen uptake efficiency slope, and [Formula: see text] were 28.14 (3.89), 4.16 (0.73), and 75.4 (8.9) mlkg(-1)min(-1) on visit 1, and 27.92 (4.63), 4.22 (0.76), and 73.6 (9.3) mlkg(-1)min(-1) on visit 2. Good reproducibility (differences ≤2.4%), but poor correlations (r≤0.29) between efficiency and [Formula: see text] were recorded. CONCLUSIONS: Reproducibility of efficiency measures was comparable to [Formula: see text] , however, poor associations between efficiency and [Formula: see text] suggested independence. Efficient ventilation may be of limited importance in determining the [Formula: see text] in a trained juvenile cyclist.
Authors:
Stephen J Brown; Aaron Raman; Zachary Schlader; Stephen R Stannard
Related Documents :
8449197 - Prognostic value of exercise radionuclide angiography in low risk acute myocardial infa...
7449807 - Differential diagnosis of atypical chest pain syndromes by equilibrium radionuclide ang...
7368207 - Cineventriculographic analysis of left ventricular dynamics during sustained handgrip e...
14600927 - The comparison of two gated spet protocols: adenosine tc-99m tetrofosmin and treadmill ...
12121427 - Walking trials in postmenopausal women: effect of one vs two daily bouts on aerobic fit...
11906177 - Exercise-induced transcription of the muscle glucose transporter (glut 4) gene.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-7-26
Journal Detail:
Title:  Journal of science and medicine in sport / Sports Medicine Australia     Volume:  -     ISSN:  1878-1861     ISO Abbreviation:  -     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-7-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9812598     Medline TA:  J Sci Med Sport     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.
Affiliation:
School of Sport and Exercise, College of Sciences, Massey University Albany, Auckland, New Zealand.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

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


Previous Document:  Electron paramagnetic resonance (EPR) spectroscopy characterization of wheat grains from plants of d...
Next Document:  Making a noisy gene: HDACs turn up the static.