What Is the Best Treatment before Bariatric Surgery? Exercise, Exercise and Group Therapy, or Conventional Waiting: a Randomized Controlled Trial.

OBJECTIVE: This trial's objective was to investigate the effect of an exercise program with and without cognitive-behavioral therapy (CBT), compared by a control group, on weight, functional capacity, and cardiometabolic profile of morbidly obese individuals while waiting for bariatric surgery.

MATERIALS AND METHODS: This randomized controlled trial investigated the effect of a 4-month low-intensity exercise program (two weekly sessions of 25 min each) on 66 morbidly obese individuals awaiting bariatric surgery. Participants were randomly divided into three groups: EXER, exercise program; EXER + CBT, exercise program plus support group sessions for lifestyle modification, with a CBT; and CONTROL, routine treatment. They were compared on weight, functional capacity, and cardiometabolic profile.

RESULTS: The weight change (Kg) was -7.4 (-9.6 to 5,1); -4,2 (-6,8 to -1.6) and 2.9 (0.4 to 5.3) and the BMI change (kg/m2 ) was -2.7 (-3.6 to -1.8); -1.4 (-2.4 to -0.4) and 1.1 (0.1 to 2.1) for groups EXER, EXER + CBT, and CONTROL, respectively. Changes were significant when compared to the control group (p < 0.001), but there were no differences between the two intervention arms (p = 0.2). Functional capacity and cardiometabolic parameters significantly improved in the intervention arms and worsened in the control group. The adherence to the exercise program in both groups was above 78 %.

CONCLUSION: A 4-month, twice-weekly supervised program of low-intensity physical activity that encourages individuals to adopt a more active lifestyle can positively interfere with weight loss and improvement in functional capacity and cardiometabolic parameters of morbidly obese individuals with and without the aid of support group sessions.