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

Claudia Miranda, Paulina Ibacache, Edgardo Opazo, Juan Rojas, Marcelo Cano

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

1 Cita (Scopus)

Resumen

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.

Título traducido de la contribuciónOxygen uptake kinetics to assess cardiorespiratory fitness in obese patients
Idioma originalEspañol
Páginas (desde-hasta)15-21
Número de páginas7
PublicaciónRevista Medica de Chile
Volumen146
N.º1
DOI
EstadoPublicada - 1 ene 2018

Palabras clave

  • Exercise test
  • Obesity
  • Oxygen consumption

Áreas temáticas de ASJC Scopus

  • Medicina (todo)

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