| Group- and individual-level coincidence of the 'Fatmax' and lactate accumulation in adolescents. | |
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MedLine Citation:
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PMID: 20376480 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Fatmax and lactate increase above baseline (LIAB) were measured in 11 adolescent girls and 8 adolescent boys during incremental cycling. Fatmax was the exercise intensity at the point of maximal fat oxidation rate (MFO). The LIAB was the exercise intensity coincident with a sustained increase in blood (lactate) above an initial baseline. We defined the minimum important difference (MID) between the exercise intensity at Fatmax and LIAB as +/-8% of both peak VO2 and peak heart rate (HR). Systematic bias was examined via the mean difference between parameters and its uncertainty, with inference based on the disposition of the confidence interval to the MID. Individual-level agreement was the proportion of differences between Fatmax and LIAB falling within the MID. MFO was at 35 (6)% peak VO2 with LIAB at 39 (7)% peak VO2 Systematic bias was -3.8% of peak VO2 and -4.4% of peak HR. The estimated population proportion with between-variable agreement within +/-8% was 0.76 for both % peak VO2 and % peak HR. Within the tolerance limits of the MID, the mean bias is 'almost certainly not' important; similarly, there is good agreement between the two parameters at the individual level. We conclude that Fatmax and lactate increase above baseline coincide in adolescents. |
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Authors:
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Keith Tolfrey; Asker E Jeukendrup; Alan M Batterham |
Publication Detail:
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Type: Journal Article Date: 2010-04-08 |
Journal Detail:
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Title: European journal of applied physiology Volume: 109 ISSN: 1439-6327 ISO Abbreviation: Eur. J. Appl. Physiol. Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-07-23 Completed Date: 2010-11-26 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100954790 Medline TA: Eur J Appl Physiol Country: Germany |
Other Details:
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Languages: eng Pagination: 1145-53 Citation Subset: IM |
Affiliation:
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School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, LE11 3TU, UK. k.tolfrey@lboro.ac.uk |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adipose Tissue
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physiology* Adolescent Energy Metabolism / physiology* Female Humans Lactic Acid / blood* Lipid Metabolism / physiology* Male Oxygen / metabolism* Oxygen Consumption / physiology* Physical Exertion / physiology* |
| Chemical | |
Reg. No./Substance:
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50-21-5/Lactic Acid; 7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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