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Memorias de investigación
Artículos en revistas:
V(T)/ t(I) relationship during steady-state exercise on a treadmill at the intensity close to second ventilatory threshold
Año:2008
Áreas de investigación
  • Fisiología,
  • Educación física y deporte
Datos
Descripción
INTRODUCTION: Few works have approached the study of the tidal volume/inspiratory time (V(T)/ t(I)) relationship during long and constant load exercise in treadmill. The aim of the present study was to analyze the relationship V(T)/ t(I) to an intensity corresponding to the mean point among the two ventilatory thresholds. MATERIAL AND METHODS: Twenty-four males have participated, carrying out two tests in treadmill: (1) maximal incremental test and (2) a 30 minutes constant load test at the intensity corresponding to the mean point among the two ventilatory thresholds. The respiratory parameters, acid-base parameters and lactate concentration was analysed during the constant load test. RESULTS: The breakpoint of relationship V(T)/ t(I) during the maximum test was reached at V(T) 2886 (465) mL, tI 0.57 (0.10) s and oxygen uptake (VO2) 4606 (532.9) mL/min. During the effort at constant load the relationships V(T)/ t(I), and tI/ tTOT (inspiratory time/total time) were significantly lower to those corresponding to the breakpoint of Hering-Breuer (PHB). Although the lactate concentration was superior to 4 mmol/L, the parameters of the acid-base state stayed inside the limits that allowed to conclude the whole test. CONCLUSIONS: A value of the relationship V(T)/ t(I) is adopted below the PHB, determinated with a maximum test, during an effort of 30 minutes at an intensity corresponding to the mean point among the two ventilatory thresholds. Both, carbon dioxide pressure end tidal values (Pet CO2) and the acid-base state, stay stable and below the values corresponding to the PHB.
Internacional
Si
JCR del ISI
Si
Título de la revista
REVISTA DE INVESTIGACION CLINICA
ISSN
0034-8376
Factor de impacto JCR
0,324
Información de impacto
Volumen
60
DOI
Número de revista
4
Desde la página
297
Hasta la página
302
Mes
JULIO
Ranking
Esta actividad pertenece a memorias de investigación
Participantes
  • AUTOR: IRMA LORENZO CAPELLÁ (UNIVERSIDAD POLITECNICA DE MADRID)
  • Autor: Pedro Jose Benito Peinado (UPM)
  • Autor: Victor Diaz Molina (UPM)
  • Autor: Ana Belen Peinado Lozano (UPM)
  • Autor: Fco. Javier Calderon Montero (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Grupo de Inv. del Laboratorio de Fisiología del Esfuerzo
  • Departamento: Salud y Rendimiento Humano
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