The slope of the VO2 slow component is associated with exercise intolerance during severe-intensity exercise
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Data
2014-12-01
Autores
Barbosa, L. F. [UNESP]
Greco, C. C. [UNESP]
Denadai, B. S. [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Akademiai Kiado Rt
Resumo
The aim of this study was to analyze the relationship between the slope of the VO2 slow component (VO(2)sc) and exercise tolerance (tlim) during constant-work-rate (CWR) exercise performed within the severe intensity domain. Fifteen active subjects (VO(2)max - 41.2 +/- 5.1 ml.kg(-1).min(-1)) performed the following tests: 1) an incremental test to determine the VO(2)max and the work rate associated with the VO(2)max (IVO(2)max) and; 2) two CWR transitions at 95% of the IVO(2)max to determine the slope of the VO2 slow component and the tlim. Three tlims were obtained: tlim1 = CWR1; tlim2 = CWR2; and tlim1+ 2 = (CWR1 + CWR2) / 2. There was no significant difference between the VO(2)max (3271.7 +/- 410.7 mL.min(-1)) and VO(2)peak obtained during the CWR tests (CWR1 = 3356.3 +/- 448.8 mL.min(-1), CWR2 = 3362.2 +/- 393.4 mL.min(-1), p > 0.05). Significant correlations (p < 0.05) were found among the VO(2)sc kinetics and tlim1 (r = -0.53), tlim2 (r = -0.49) and tlim1+2 (r = -0.55). Thus, exercise tolerance during CWR performed within the severe intensity domain is partially explained by the slope of the VO2 slow component.
Descrição
Palavras-chave
Exercise performance, Oxygen kinetics, Cycling, Endurance, Fatigue
Como citar
Acta Physiologica Hungarica. Budapest: Akademiai Kiado Rt, v. 101, n. 4, p. 517-523, 2014.