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Titre du Document
Comparison of critical swimming velocity and velocity at lactate threshold in elite triathletes
Auteur(s)
MARTIN L. ; WHYTE G. P.
Résumé
The purpose of this study was to determine whether the critical swimming velocity (Vcrit) corresponds to the velocity at lactate threshold (V-LT) in elite triathletes. Eight elite triathletes (5 male, 3 female; age 26 ± 4 years; height 1.7 ± 0.1 m and body mass 75 ± 4 kg) participated in the study. Vcrit, defined as the speed that could theoretically be maintained indefinitely without exhaustion, was expressed as the slope of a regression line between swimming distance covered and the corresponding times of five time trials over 100, 200, 400, 800 and 1500m and all combinations of these. Lactate threshold (LT) was determined by visual inspection as the point of first inflection of the lactate-work rate curve following 5 × 300 m swims of increasing velocity which were paced using the Aquapacer (Challenge and Response, Inverurie, Scotland). Velocities of the 300 m swims were - 10, - 5, 0, + 5 and + 10% of the average 100 m pace from a 1500 m time trial. Vcrit was similar regardless of the combination or number of time trials used in the linear regression. For all subjects Vcrit was significantly faster (p < 0.05) than V-LT (1.23 ± 0.11 m.s-1 and 1.15 ± 0.10 m.s-1 respectively). Blood lactate concentrations were also significantly higher (p < 0.05) at Vcrit (3.0 ± 1.0 mM) than at LT (1.9 ± 0.4 mM). Results from the present study demonstrate that Vcrit can be calculated from any two time trials in triathletes, however Vcrit did not represent V-LT in triathlete
Editeur
Thieme; Thieme
Identifiant
PMID : 10950447 ISSN : 0172-4622 CODEN : IJSMDA
Source
International journal of sports medicine A. 2000, vol. 21, n° 5, pp. 366-368 [bibl. : 15 ref.]
Langue
Anglais
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