Banca de QUALIFICAÇÃO: NICOLE SOARES OLIVER CRUZ

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE : NICOLE SOARES OLIVER CRUZ
DATA : 15/09/2017
HORA: 14:00
LOCAL: Departamento de Fisioterapia (Parecer)
TÍTULO:

Comparison of cardiopulmonary, metabolic performance, oxygen kinetics and oxygen consumption efficiency curve of obese women during treadmill exercise and bicycle test protocols

PALAVRAS-CHAVES:

Obesity; Cardiopulmonary exercise test; Oxygen consumption; Anaerobic threshold; Oxygen kinetics.

PÁGINAS: 82
GRANDE ÁREA: Ciências da Saúde
ÁREA: Fisioterapia e Terapia Ocupacional
RESUMO:

Background: Maximum cardiopulmonary exercise test (CPX) represents an objective measure of functional capacity and quantifies the origin of exercise limitation, mainly through peak oxygen consumption (VO₂peak) and ventilatory threshold (VL). Several exercise protocols using a bicycle or treadmill are used to evaluate cardiorespiratory performance; however, for obese individuals, it is not known which ergometer promotes greater physical stress and the one that better evaluates the physical performance of these subjects. In addition, little is known about the behavior of the oxygen curve, ie its rate of increase (O₂ kinetics) and the oxygen consumption efficiency curve (OUES) of obese adults also using different exercise ergometers. Objective: To compare the cardiorespiratory, metabolic performance, oxygen kinetics and oxygen consumption efficiency curve of obese women during cardiopulmonary exercise tests using conventional treadmill and ergometric bicycle through incremental ramp and constant load protocols. Design: The sample consisted of 40 obese volunteers, based on sample calculations, randomized into two groups of 20 obese each. Clinical, anthropometric and adiposity evaluation (Weight, Height, BMI-Body Mass Index, BAI-Body Adiposity Index, WHR-waist-hip ratio, HC-hip circumference, HC-waist circumference, NC-neck circumference) and spirometry ((FVC-forced vital capacity, FEV₁-forced expiratory volume in the 1st second, PEF-peak expiratory flow, MVV-maximum voluntary ventilation). First the CPX was performed, using conventional treadmill or ergometric bicycle, depending on the subject's allocation. Second, two constant load tests with different intensities (25% <VL; 25%> VL) were performed, with 30 minutes rest between tests. In all tests, the ventilatory measures (VE-ventilation per minute, VE/VO2-ventilatory equivalent of oxygen, VE/VCO2-ventilatory equivalent of carbon dioxide, R-gas exchange ratio) and metabolic (VO2-consumption of Oxygen, VCO2-carbon dioxide production) of respiratory gases (Cortex-Biophysik-Metamax3B), in addition to the variables of perceived exertion (fatigue and dyspnea - Borg6-20), HRmax (maximum heart rate), and systolic and diastolic blood pressure. Statistic 10.0 software was used for the statistical analysis of the CPX and Sigma Plot 11.0 software for oxygen kinetics analysis, with a value of 5% being assigned to test the hypotheses. Preliminary results: the sample presented preserved pulmonary function for both groups, as well as homogeneity between the analyzed groups. The obese women had a mean age of 34.1±5.4 years and a mean weight of 110.5±16.8 kg, in addition to a severe degree of obesity, with a mean BMI of 43.5 ± 6.7. At the end of the tests, the group that performed the CPX in Treadmill presented an earlier interruption of the test (459.2±91.7 seconds) than the group that performed the CPX in the Bicycle (613.2±142.9). However, despite the shortest duration of the test, the treadmill group presented higher VO₂peak values, ml/kg/min higher than the group that performed the bicycle test (treadmill: VO₂peak: 18.1±3.3% VO²peak: 93.2±12.4, bicycle: VO²peak: 12.2±2.1% VO²peak: 66.1±8.6).

MEMBROS DA BANCA:
Externo à Instituição - RAQUEL RODRIGUES BRITTO - UFMG
Presidente - 1149619 - SELMA SOUSA BRUNO
Externo à Instituição - SHIRLEY LIMA CAMPOS - UFPE