Efeitos da cirurgia bariátrica e de um programa de reabilitação na aptidão cardiorrespiratória e função pulmonar em mulheres obesas

Abstract

Introduction: The number of indications for bariatric surgery (BS) has increased worldwide, proving to be a useful measure in the treatment of severe obesity, promoting reduction of morbimortality, improvement of cardiorespiratory / metabolic alterations and higher quality of life. Rehabilitation programs after BS have been stimulated, being especially important in controlling comorbidities and regaining body weight in the long term. Despite this, there is little evidence related to the effects of BS, with or without rehabilitation, on cardiorespiratory fitness (CRF), a measure that strongly impacts mortality and weight control. In this context, it is necessary to follow the functional capacity and the implementation of rehabilitation programs in the postoperative period (PO) of BS, since isolated weight loss does not seem to increase the CRF in individuals who remain sedentary after surgery. Objectives: To evaluate the effects of BS and a structured program of cardiopulmonary and metabolic rehabilitation (applied in the PO) on CRF and pulmonary function in obese women, and to compare them to a control group. Methods: The research was divided into two stages. Initially, a follow-up study consisting of anthropometric, spirometric and cardiorespiratory / functional evaluation (Cardiopulmonary Exercise Testing-CPX) was performed in 34 obese women before and after BS, of which two articles resulted. In the second stage, we performed a non-randomized, simple blind trial involving 12 obese adult women (grade II and III) candidates for BS, who were divided into control-CG group (n = 6) and intervention group-IG (n = 6). All patients were evaluated in the preoperative, third (3MPO) and sixth month of PO (6MPO), regarding the same parameters of the first stage. The IG participated in a specific rehabilitation program which consisted of aerobic and resistance exercises for 12 weeks and starting at 3MPO. The CG received only general guidelines. Thus, a total of three scientific articles were produced, where the statistical strategy varied according to the methodology of each study. A significance level was set at p <0.05. Results: After BS, all the patients evaluated had a significant reduction (p <0.001) in comorbidities (hypertension and diabetes) and anthropometric measurements, in addition to an improvement in pulmonary function (p <0.05). However, only those obese who participated in the physical training protocol presented a significant increase (p <0.05) in VO2peak and in the total duration of CPX, of 5.9 ml / kg / min (23.8%) and 4.9 minutes (42.9%), respectively. After a period of 9.4 ± 2.7 months of PO, there was a reduction of absolute VO2peak (p <0.001) in patients who remained sedentary after BS (n = 34), with no differences in relative VO2peak to body weight (p = 0.06). We also observed a moderate correlation (r = -0.52, p <0.05) between ΔVO2peak and ΔNC-neck circumference. Conclusions: The CRF increased significantly only in the group of obese women who participated in a structured rehabilitation program after three months of CB, indicating that exercise tolerance and aerobic capacity may not increase in women who remain inactive after surgery. However, regardless of exercise practice, weight loss induced surgically improved pulmonary function and reduced major comorbidities.