Efeito agudo do ultrassom focalizado de alta intensidade na lipodistrofia abdominal de mulheres jovens: ensaio clínico controlado e randomizado

Abstract

Introduction: High Intensity Focused Ultrasound - HIFU has been one of the treatment options for localized lipodystrophy, based on mechanical and thermal effects to promote lipolysis. However, although its clinical use is frequent, the acute effects on body composition are not yet reported in the literature. Objective: To evaluate the acute effects of HIFU associated with aerobic and anaerobic physical exercise on the body composition of the abdominal region of healthy women. Methods: A treatment protocol was applied in 15 women (70.1 ± 3.56kg, 1.62 ± 0.06m, ± 26.81 ± 1.16kg / m2), randomly divided into two groups: Group HIFU + Exercise (GUEX), submitted to three sessions of HIFU of 28 Watts of power, with Frequency of 1.8MHz, time of firing of 2 seconds, in the infra-abdominal region, with subsequent accomplishment of a protocol of physical activity to 70% of maximum heart rate; and Group Placebo + Exercise (GPEX), which had the same protocol as the GUEX, but was performed with the equipment turned off, being a placebo group. All volunteers underwent three evaluations, one at T0 (before the first day of treatment); one at T1 (before the second day of treatment) and one at T2 (before the third day of treatment). In order to do so, circumference measurements of the treated, skin fold (abdominal and supra-iliac), digital photographs and body composition measurements (Tanita bioimpedance balance) were performed. The analyzes were performed using the SPSS-20.0 statistical package, using the Anova test for repeated measures to verify the significant differences between groups and evaluations, considering both the level of significance (P≤0.05). Results: There was no significant change in any of the anthropometric measures (P> 0.05) or body composition (P> 0.05) for any of the treatment groups. Conclusion: The proposed protocol using HIFU was not an efficient resource to obtain an acute effect in the reduction of localized lipodystrophy for the present sample.