Effect of biological maturation on maximal oxygen uptake and ventilatory thresholds in soccer players: an allometric approach |
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| Authors: | Cunha Giovani Lorenzi Thiago Sapata Katiuce Lopes Andre Luiz Gaya Adroaldo Cezar Oliveira Álvaro |
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| Institution: | School of Physical Education, Federal University of Rio Grande do Sul, Porto Alegre, Brazil. |
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| Abstract: | In this study, we investigated the effect of biological maturation on maximal oxygen uptake (Vdot]O(2max)) and ventilatory thresholds (VT(1) and VT(2)) in 110 young soccer players separated into pubescent and post-pubescent groups.. Maximal oxygen uptake and Vdot]O(2) corresponding to VT(1) and VT(2) were expressed as absolute values, ratio standards, theoretical exponents, and experimentally observed exponents. Absolute Vdot]O(2) (ml · min(-1)) was different between groups for VT(1), VT(2), and Vdot]O(2max). Ratio standards (ml · kg(-1) · min(-1)) were not significantly different between groups for VT(1), VT(2), and Vdot]O(2max). Theoretical exponents (ml · kg(-0.67) · min(-1) and ml · kg(-0.75) · min(-1)) were not properly adjusted for the body mass effects on VT(1), VT(2), and Vdot]O(2max). When the data were correctly adjusted using experimentally observed exponents, VT(1) (ml · kg(-0.94) · min(-1)) and VT(2) (ml · kg(-0.95) · min(-1)) were not different between groups. The experimentally observed exponent for Vdot]O(2max) (ml · kg(-0.90) · min(-1)) was different between groups (P = 0.048); however, this difference could not be attributed to biological maturation. In conclusion, biological maturation had no effect on VT(1), VT(2) or Vdot]O(2max) when the effect of body mass was adjusted by experimentally observed exponents. Thus, when evaluating the physiological performance of young soccer players, allometric scaling needs to be taken into account instead of using theoretical approaches. |
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