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GAZZETTA MEDICA ITALIANA ARCHIVIO PER LE SCIENZE MEDICHE
A Journal on Internal Medicine and Pharmacology
Indexed/Abstracted in: BIOSIS Previews, EMBASE, Scopus, Emerging Sources Citation Index
Gazzetta Medica Italiana Archivio per le Scienze Mediche 2010 October;169(5):163-71
Comparison between protocols for the determination of anaerobic threshold in adolescent swimmers
Melo Altimari J., Altimari L. R., Coelho Greco C., Yuzo Nakamura F., Serpeloni Cyrino E., Traína Chacon-Mikahil M. P.
1 Department of Physical Education CCBS, University North of the Paraná (UNOPAR), Londrina, PR, Brazil
2 Center for Physical Education and Sport, State University of Londrina (UEL), Londrina, PR, Brazil
3 Human Performance Laboratory, Department of Physical Education, Paulista State University (UNESP), Rio Claro, SP, Brazil
4 Faculty of Physical Education
S tate University of Campinas (UNICAMP), Campinas, SP, Brazil
Aim. The purpose of this study was to compare the anaerobic threshold speed (AT) obtained from fixed lactate blood concentrations (AT 4 mM and AT 3.5 mM), lactate minimum speed (LM) and critical speed (CS), determined from different distances in fifteen Brazilian national level swimmers (10 boys = 14.8 ± 0.6 years old and 5 girls = 14.6 ± 0.8 year-old).
Methods. The tests to determine the AT 4 mM, AT 3.5 mM, LM and CS were performed in a 25 m swimming pool and consisted of 7 or 8 evaluations separated by 24-48 h intervals. Data were submitted to analysis of variance (ANOVA) for repeated measures, followed by the post hoc Scheffé test and Pearson correlation coefficients. Significance was set at P<0.01.
Results. There were no significant differences among the values for AT 4 mM and CS1 (1.34 ± 0.05 vs. 1.33 ± 0.05 m.s-1, respectively). However, AT 4 mM and CS1 were significantly higher than AT 3.5 mM (1.28 ± 0.04 m.s-1), LM (1.27 ± 0.05 m.s-1), CS2 (1.26 ± 0.06 m.s-1), CS3 (1.27 ± 0.06 m.s-1) and CS4 (1.25 ± 0.07 m.s-1). There were no significant differences among the values for AT 3.5 mM, LM, CS2, CS3 and CS4.
Conclusion. The results obtained in this study suggest that the anaerobic threshold determined by a fixed lactate concentration of 3.5 mM, as well as the LM and the CS methods determined by different distances, seem to be the most appropriate indexes for the evaluation of aerobic capacity in adolescent swimmers.