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Revista Brasileira de Medicina do Esporte

Print version ISSN 1517-8692

Abstract

MAINARDI, Fernanda; INOUE, Allan; POMPEU, Fernando Augusto de Saboia  and  SANTOS, Tony Meireles. Predictive validity of VO2máx measurement and estimates in Mountain Bikers' performance. Rev Bras Med Esporte [online]. 2015, vol.21, n.1, pp.44-48. ISSN 1517-8692.  http://dx.doi.org/10.1590/1517-86922015210101605.

INTRODUCTION:

considering the rationale for the use of predictive equations to estimate VO2max in athletes, no study has established its validity for performance in mountain bike cross-country (XCO).

OBJECTIVE:

the aim was to compare different strategies for determining VO2max, directly or indirectly, for predicting performance in a simulated and in a real competition.

METHODS:

20 XCO male athletes (31.6 ± 6.8 anos; 68.1 ± 6.5 kg; 175.5 ± 5.7cm; VO2max 64.9 ± 4.4 mL. kg-1.min-1), were submitted to three experimental sessions. In the first visit, there were risk stratification, anthropometric evaluation and maximum progressive test. In the second, a simulated race was performed and, in the third session, a XCO competition was performed.

RESULTS:

the correlation between the simulated competition and the predictive equations of VO2max in absolute values reached an almost perfect relationship (r ≥ 0.9). The correlations between the real competition and estimated VO2max relativized to body mass achieved results classified as very high (r = 0.7 to .89). The associations between the direct measurement of VO2max and the simulation were classified as small for values relative to body mass (r = 0.10, CI95% -0.35 to 0.51). For the actual performance, the classification was moderate (r = 0.48, CI95% 0.009 to 0.78).

CONCLUSION:

this study was the first to demonstrate the predictive validity of the estimates of VO2max for the simulated and real MTB performance. In addition, it confirmed the low predictive validity of direct measurement of VO2max for the same purpose.

Keywords : reproducibility of results; sports; athletic performance; exercise.

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