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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
Miranda, Claudia; Ibacache, Paulina; Opazo, Edgardo; Rojas, Juan; Cano, Marcelo.
Afiliação
  • Miranda, Claudia; Universidad Andres Bello. Facultad de Ciencias de la Rehabilitación. Escuela de Kinesiología. Santiago. CL
  • Ibacache, Paulina; Universidad Andres Bello. Facultad de Ciencias de la Rehabilitación. Escuela de Kinesiología. Santiago. CL
  • Opazo, Edgardo; Universidad Andres Bello. Facultad de Ciencias de la Rehabilitación. Escuela de Kinesiología. Santiago. CL
  • Rojas, Juan; Universidad Andres Bello. Facultad de Ciencias de la Rehabilitación. Escuela de Kinesiología. Santiago. CL
  • Cano, Marcelo; Universidad Andres Bello. Facultad de Ciencias de la Rehabilitación. Escuela de Kinesiología. Santiago. CL
Rev. méd. Chile ; 146(1): 15-21, ene. 2018. tab, graf
Artigo em Espanhol | LILACS-Express | LILACS | ID: biblio-902617
Biblioteca responsável: BR1.1
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 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.

Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: LILACS 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

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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: LILACS 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
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