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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 2008 April;167(2):43-9
Effects of biological maturation on maximal oxygen uptake and ventilatory breakpoint of Brazilian soccer players
Dos Santos Cunha G. 1, Garcia Célia F. 1, Ribeiro J. L. 1,2, Reischak De Oliveira A. 1
1 Escola de Educação Física Laboratório de Pesquisa do Exercício Universidade Federal do Rio Grande do Sul Porto Alegre, Brasil
2 Escola de Educação Física Instituto Porto Alegre, Porto Alegre, Brasil
Aim. The purpose of this study was to verify the effect of biological maturation on soccer players’ maximal oxygen uptake (.VO2max) and ventilatory breakpoint (VB) expressed in three different forms.
Methods. Thirty-seven male amateur athletes (14 years old) were divided according to Tanner’s maturational degree into three groups, prepubescent (PreP), pubescent (Pub) and postpubescent (PostP). Ventilation, ventilatory equivalents, respiratory exchange ratio were measured by indirect calorimetry. The .VO2max was expressed in absolute values, relative to body mass and according appropriate scaling procedures. First ventilatory breakpoint (VB1) and second ventilatory breakpoint (VB2) were used as index of aerobic and anaerobic thresholds.
Results. When .VO2 was expressed in absolute terms, difference among groups was found in .VO2max and VB2, with PostP having higher values compared to PreP and Pub. There was no difference among groups in .VO2 when it was expressed as relative form in .VO2max (49.9±3.1, 50.0± 3.0 and 49.8±2.9 for PreP, Pub and PostP respectively) and VB2, however PreP showed a higher VB1 than both Pub and PostP. There was difference among groups in .VO2 expressed according to allometric scaling at .VO2max (126.9±10.9, 136.4±8.6 and 139.9±9,1for PreP, Pub and PostP respectively) and VB1. The difference was verified at VB2 only between PreP and PostP.
Conclusion. In conclusion, biological maturation affects young soccer players’ VB1, VB2, .VO2max, and the allometric expression seems to be the more appropriate to adjust the effects of body mass.