Evaluation Of Body Composition Changes After Bariatric Surgery According To Gender And Anatomical Region

Abstract

Purpose: Bariatric surgery induces acute weight loss, but there is insufficient information about its effect on postoperative early changes in body composition (BC). In this study, BC changes in the first month after Mini gastric bypass (MGB) and Sleeve gastrectomy (SG) were examined according to gender and anatomical region. Materials and methods: Body composition changes in 100 morbidly obese patients (70 women, 30 men) after MGB and SG were measured using Bioelectrical Impedance Analysis (BIA) technology. Results: After MGB, both men and women had a reduction in both their body fat (p=0.071) and lean tissue mass (p=0.781). In addition, muscle mass loss was not statistically significant in all groups after MGB. However, after SG, significant fat tissue loss occurred in women (p=0.014), whereas in men, there was a significant decrease in lean tissue mass (p=0.029) and upper limb muscle mass (p=0.001). Conclusion: Our study clearly shows that bariatric surgery induces acute weight loss and that both whole-body fat and lean tissue mass are affected, and muscle loss in some anatomical regions is higher than fat loss. It has been found that changes in body composition in the early period after bariatric surgery may include differences according to gender and surgical procedure. Since muscle mass loss can have harmful consequences in the long term, nutritional strategies should be determined as soon as possible after bariatric surgery. © 2020, Pamukkale University. All rights reserved.