Document Detail


Lactate accumulation in response to supramaximal exercise in rowers.
MedLine Citation:
PMID:  22288604     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The aim of this study was to test (a) three methods to estimate the quantity of lactate accumulated (Q(LaA) ) in response to supramaximal exercise and (b) correlations between Q(LaA) and the nonoxidative energy supply assessed by the accumulated oxygen deficit (AOD). Nine rowers performed a 3-min all-out test on a rowing ergometer to estimate AOD and lactate accumulation in response to exercise. Peak blood lactate concentration [(La)(peak) ] during recovery was assessed, allowing Q(LaA(m1)) to be estimated by the method of Margaria et al. Application of a bicompartmental model of lactate distribution space to the blood lactate recovery curves allowed estimation of (a) the net amount of lactate released during recovery from the active muscles (NALR(max) ), and (b) Q(LaA) according to two methods (Q(LaA(m2)) and Q(LaA(m3)) ). (La)(peak) did not correlate with AOD. Q(LaA(m1)) , Q(LaA(m2)) and Q(LaA(m3)) correlated with AOD (r = 0.70, r = 0.85 and r = 0.92, respectively). These results confirm that (La)(peak) does not provide reliable information on nonoxidative energy supply during supramaximal exercise. The correlations between AOD and Q(LaA(m2)) and Q(LaA(m3)) support the concept of studying blood lactate recovery curves to estimate lactate accumulation and thus the contribution of nonoxidative pathway to energy supply during supramaximal exercise.
Authors:
H Maciejewski; M Bourdin; J-R Lacour; C Denis; B Moyen; L Messonnier
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-1-31
Journal Detail:
Title:  Scandinavian journal of medicine & science in sports     Volume:  -     ISSN:  1600-0838     ISO Abbreviation:  -     Publication Date:  2012 Jan 
Date Detail:
Created Date:  2012-1-31     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9111504     Medline TA:  Scand J Med Sci Sports     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2012 John Wiley & Sons A/S.
Affiliation:
University of Lyon, University Lyon 1, IFSTTAR, LBMC UMR_T 9406, Oullins, France; French Rowing Federation (FFSA), Nogent-sur-Marne, France.
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