Uso de la cinética del consumo de oxígeno para la evaluación de la capacidad cardiorrespiratoria en pacientes con obesidad / Oxygen uptake kinetics to assess cardiorespiratory fitness in obese patients
Rev. méd. Chile
; 146(1): 15-21, ene. 2018. tab, graf
Artigo
em Espanhol
| LILACS
| ID: biblio-902617
Biblioteca responsável:
CL1.1
ABSTRACT
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 andMethods:
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.
Texto completo:
Disponível
Coleções:
Bases de dados internacionais
Base de dados:
LILACS
Assunto principal:
Consumo de Oxigênio
/
Aptidão Cardiorrespiratória
/
Obesidade
Limite:
Adolescente
/
Adulto
/
Feminino
/
Humanos
/
Masculino
Idioma:
Espanhol
Revista:
Rev. méd. Chile
Assunto da revista:
Medicina
Ano de publicação:
2018
Tipo de documento:
Artigo
País de afiliação:
Chile
Instituição/País de afiliação:
Universidad Andres Bello/CL