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Author(s): reis, vm
silva, aj
ascensao, a
duarte, ja
Title: Inclusion of exercise intensities above the lactate threshold in VO2/running speed regression does not improve the precision of accumulated oxygen deficit estimation in endurance-trained runners
Issue Date: 2005
Abstract: The present study intended to verify if the inclusion of intensities above lactate threshold ( LT) in the VO2/running speed regression (RSR) affects the estimation error of accumulated oxygen deficit (AOD) during a treadmill running performed by endurance-trained subjects. Fourteen male endurance-trained runners performed a sub maximal treadmill running test followed by an exhaustive supra maximal test 48h later. The total energy demand (TED) and the AOD during the supra maximal test were calculated from the RSR established on first testing. For those purposes two regressions were used: a complete regression (CR) including all available sub maximal VO2 measurements and a sub threshold regression (STR) including solely the VO2 values measured during exercise intensities below LT. TED mean values obtained with CR and STR were not significantly different under the two conditions of analysis (177.71 +/- 5.99 and 174.03 +/- 6.53 ml center dot kg(-1), respectively). Also the mean values of AOD obtained with CR and STR did not differ under the two conditions (49.75 +/- 8.38 and 45.8 9 +/- 9.79 ml center dot kg(-1), respectively). Moreover, the precision of those estimations was also similar under the two procedures. The mean error for TED estimation was 3.27 +/- 1.58 and 3.41 +/- 1.85 ml center dot kg(-1) ( for CR and STR, respectively) and the mean error for AOD estimation was 5.03 +/- 0.32 and 5.14 +/- 0.35 ml center dot kg(-1) ( for CR and STR, respectively). The results indicated that the inclusion of exercise intensities above LT in the RSR does not improve the precision of the AOD estimation in endurance-trained runners. However, the use of STR may induce an underestimation of AOD comparatively to the use of CR.
Subject: Ciências da saúde
Health sciences
Scientific areas: Ciências médicas e da saúde::Ciências da saúde
Medical and Health sciences::Health sciences
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FADEUP - Artigo em Revista Científica Internacional

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