Lactate accumulation in response to supramaximal exercise in rowers. Issue 5 (31st January 2012)

• Record Type: Journal Article
• Authors: Maciejewski, H.; Bourdin, M.; Lacour, J.‐R.; Denis, C.; Moyen, B.; Messonnier, L.
• Is Part Of: Scandinavian journal of medicine & science in sports. Volume 23:Issue 5(2013)
• Page Start: 585
• Page End: 592
• Publication Date: 2012-01-31
• Subjects: Sports medicine -- Periodicals; Sports -- Physiological aspects -- Periodicals; Sports -- Periodicals; 617.1027
• DOI: 10.1111/j.1600-0838.2011.01423.x
• Languages: English
• ISSNs: 0905-7188

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>The aim of this study was to test (a) three methods to estimate the quantity of lactate accumulated (Q<sub>LaA</sub>) in response to supramaximal exercise and (b) correlations between Q<sub>LaA</sub> 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)<sub>peak</sub>] during recovery was assessed, allowing Q<sub>LaA(m1)</sub> 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<sub>max</sub>), and (b) Q<sub>LaA</sub> according to two methods (Q<sub>LaA(m2)</sub> and Q<sub>LaA(m3)</sub>). (La)<sub>peak</sub> did not correlate with AOD. Q<sub>LaA(m1)</sub>, Q<sub>LaA(m2)</sub> and Q<sub>LaA(m3)</sub> correlated with AOD (<italic>r</italic> = 0.70, <italic>r</italic> = 0.85 and <italic>r</italic> = 0.92, respectively). These results confirm that (La)<sub>peak</sub> does not provide reliable information on nonoxidative energy supply during supramaximal exercise. The correlations between AOD and Q<sub>LaA(m2)</sub> and Q<sub>LaA(m3)</sub> 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.</p> </abstract>