Document Detail


Metabolic consequences of resistive force selection during cycle ergometry exercise.
MedLine Citation:
PMID:  17365948     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The purpose of this study was to compare power outputs and blood lactate concentrations ([La-]B) following 30 s of maximal cycle ergometry when resistive forces were derived from total-body mass (TBM) or fat-free mass (FFM). Differences (P < 0.05) in peak power output (PPO), pedal velocity (PV) and resistive forces (RF) were observed when the TBM and FFM protocols were compared (953 +/- 114 W vs. 1020 +/- 134 W; 134 +/- 8 rpm vs. 141 +/- 7 rpm; 6 +/- 1 kg vs. 5 +/- 1 kg, respectively). Blood lactate values ([La-]B) increased (P < 0.01) postexercise for both protocols and were significantly greater for TBM (10.6 +/- 1.2 mmol.l-1 vs 11.6 +/- 1.1 mmol.l-1, P < 0.05). These findings indicate that the FFM resistive force protocol may maximise adenosinotriphosphate-phosphocreatine (ATP-PC) utilisation with smaller contributions from anaerobic glycolysis when compared with TBM. These results may have important implications in the assessment of high intensity exercise performance.
Authors:
Julien S Baker; Michael R Graham; Bruce Davies
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Publication Detail:
Type:  Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  Research in sports medicine (Print)     Volume:  15     ISSN:  1543-8627     ISO Abbreviation:  Res Sports Med     Publication Date:    2007 Jan-Mar
Date Detail:
Created Date:  2007-03-16     Completed Date:  2007-05-18     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  101167637     Medline TA:  Res Sports Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1-11     Citation Subset:  IM    
Affiliation:
Health and Exercise Science Research Laboratory, School of Applied Science, University of Glamorgan, Pontypridd, Wales. jsbaker@glam.ac.uk
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MeSH Terms
Descriptor/Qualifier:
Adipose Tissue
Adult
Bicycling / physiology*
Body Composition
Cross-Over Studies
Exercise / physiology*
Humans
Lactic Acid / analysis,  blood,  metabolism*
Male
Physical Exertion / physiology
Wales
Chemical
Reg. No./Substance:
50-21-5/Lactic Acid

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


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