Uso de la cinética del consumo de oxígeno para la evaluación de la capacidad cardiorrespiratoria en pacientes con obesidad

Background: The evaluation of cardiorespiratory fitness (RCC) using maximal or peak oxygen consumption (VO2), requires a high level of effort in obese patients. We propose a method to evaluate RCC using constant and moderate loads, called VO2 kinetics (tau). Aim: To determine the relationship betw...

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Autores principales:	Miranda,Claudia, Ibacache,Paulina, Opazo,Edgardo, Rojas,Juan, Cano,Marcelo
Lenguaje:	Spanish / Castilian
Publicado:	Sociedad Médica de Santiago 2018
Materias:	Exercise Test Obesity Oxygen Consumption
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0034-98872018000100015
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spelling	oai:scielo:S0034-988720180001000152018-05-11Uso de la cinética del consumo de oxígeno para la evaluación de la capacidad cardiorrespiratoria en pacientes con obesidadMiranda,ClaudiaIbacache,PaulinaOpazo,EdgardoRojas,JuanCano,Marcelo Exercise Test Obesity Oxygen Consumption Background: The evaluation of cardiorespiratory fitness (RCC) using maximal or peak oxygen consumption (VO2), requires a high level of effort in obese patients. We propose a method to evaluate RCC using constant and moderate loads, called VO2 kinetics (tau). Aim: To determine the relationship between tau and peak VO2 in patients with obesity. Material and Methods: Forty patients (87% females) aged 37 ± 12 years and with a body mass index (BMI) of 34.6 ± 4.0 kg/m2, were divided into two groups according to the applied workload (0.5 and 0.8 Watts/kg body mass) using a cycle ergometer and Cortex Metalyzer 3b equipment. The protocol was started with 6 minutes at constant load and then increments of 20-25 Watts every two min were made until determination of the peak VO2. Results: The tau value was 51.8 ± 17.6 s, the absolute peak VO2 was 2.0 ± 0.7 L/min and the relative peak VO2 was 26.6 ± 30.0 ml/kg/min. There was a significant difference of tau medians between the group that used 0.5 and 0.8 Watts/kg (p = 0.002) and a significant inverse correlation between the absolute peak VO2 and the tau value for a load of 0.5 Watts/kg (rho = -0.415, p = 0.0327). Conclusions: The higher tau value, the lower the peak VO2 of an obese patient. It is suggested to apply loads of 0.5 Watts/kg for a VO2 kinetics test in obese patients or in subjects who do not wish to carry out higher physiological demands with a non-invasive and low risk procedure.info:eu-repo/semantics/openAccessSociedad Médica de SantiagoRevista médica de Chile v.146 n.1 20182018-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0034-98872018000100015es10.4067/s0034-98872018000100015
institution	Scielo Chile
collection	Scielo Chile
language	Spanish / Castilian
topic	Exercise Test Obesity Oxygen Consumption
spellingShingle	Exercise Test Obesity Oxygen Consumption Miranda,Claudia Ibacache,Paulina Opazo,Edgardo Rojas,Juan Cano,Marcelo Uso de la cinética del consumo de oxígeno para la evaluación de la capacidad cardiorrespiratoria en pacientes con obesidad
description	Background: The evaluation of cardiorespiratory fitness (RCC) using maximal or peak oxygen consumption (VO2), requires a high level of effort in obese patients. We propose a method to evaluate RCC using constant and moderate loads, called VO2 kinetics (tau). Aim: To determine the relationship between tau and peak VO2 in patients with obesity. Material and Methods: Forty patients (87% females) aged 37 ± 12 years and with a body mass index (BMI) of 34.6 ± 4.0 kg/m2, were divided into two groups according to the applied workload (0.5 and 0.8 Watts/kg body mass) using a cycle ergometer and Cortex Metalyzer 3b equipment. The protocol was started with 6 minutes at constant load and then increments of 20-25 Watts every two min were made until determination of the peak VO2. Results: The tau value was 51.8 ± 17.6 s, the absolute peak VO2 was 2.0 ± 0.7 L/min and the relative peak VO2 was 26.6 ± 30.0 ml/kg/min. There was a significant difference of tau medians between the group that used 0.5 and 0.8 Watts/kg (p = 0.002) and a significant inverse correlation between the absolute peak VO2 and the tau value for a load of 0.5 Watts/kg (rho = -0.415, p = 0.0327). Conclusions: The higher tau value, the lower the peak VO2 of an obese patient. It is suggested to apply loads of 0.5 Watts/kg for a VO2 kinetics test in obese patients or in subjects who do not wish to carry out higher physiological demands with a non-invasive and low risk procedure.
author	Miranda,Claudia Ibacache,Paulina Opazo,Edgardo Rojas,Juan Cano,Marcelo
author_facet	Miranda,Claudia Ibacache,Paulina Opazo,Edgardo Rojas,Juan Cano,Marcelo
author_sort	Miranda,Claudia
title	Uso de la cinética del consumo de oxígeno para la evaluación de la capacidad cardiorrespiratoria en pacientes con obesidad
title_short	Uso de la cinética del consumo de oxígeno para la evaluación de la capacidad cardiorrespiratoria en pacientes con obesidad
title_full	Uso de la cinética del consumo de oxígeno para la evaluación de la capacidad cardiorrespiratoria en pacientes con obesidad
title_fullStr	Uso de la cinética del consumo de oxígeno para la evaluación de la capacidad cardiorrespiratoria en pacientes con obesidad
title_full_unstemmed	Uso de la cinética del consumo de oxígeno para la evaluación de la capacidad cardiorrespiratoria en pacientes con obesidad
title_sort	uso de la cinética del consumo de oxígeno para la evaluación de la capacidad cardiorrespiratoria en pacientes con obesidad
publisher	Sociedad Médica de Santiago
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0034-98872018000100015
work_keys_str_mv	AT mirandaclaudia usodelacineticadelconsumodeoxigenoparalaevaluaciondelacapacidadcardiorrespiratoriaenpacientesconobesidad AT ibacachepaulina usodelacineticadelconsumodeoxigenoparalaevaluaciondelacapacidadcardiorrespiratoriaenpacientesconobesidad AT opazoedgardo usodelacineticadelconsumodeoxigenoparalaevaluaciondelacapacidadcardiorrespiratoriaenpacientesconobesidad AT rojasjuan usodelacineticadelconsumodeoxigenoparalaevaluaciondelacapacidadcardiorrespiratoriaenpacientesconobesidad AT canomarcelo usodelacineticadelconsumodeoxigenoparalaevaluaciondelacapacidadcardiorrespiratoriaenpacientesconobesidad
_version_	1718436984377049088

Uso de la cinética del consumo de oxígeno para la evaluación de la capacidad cardiorrespiratoria en pacientes con obesidad

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