Efeito do treinamento de força com restrição de fluxo sanguíneo nos marcadores de função hepática e na composição corporal de mulheres idosas com sobrepeso

Abstract

Strength training with blood flow restriction (BFR) has been shown to be a promising strategy for populations with functional limitations, such as overweight elderly individuals. This study aimed to analyze the effects of strength training with blood flow restriction on liver function and body composition in overweight elderly women. Forty overweight elderly women aged between 60 and 77 (66.07 ± 4.14) years were randomly assigned to three strength training (ST) groups using low load combined with RFS (ST+RFS); moderate load (ST); and low load (ST), in addition to a control group (CON). The experiment lasted 16 weeks, with three weekly sessions, two exercises for the lower limbs and two for the upper limbs, non-consecutive, containing three sets of 10 repetitions. The variables included were: body mass (BM), body mass index (BMI) and body fat percentage (%BF), analyzed using the InBody 570 Biospace®; fasting blood samples were collected before and after the intervention to analyze liver function: alanine transferase (ALT), aspartate transferase (AST), alkaline phosphatase (ALP), gamma glutamyl transferase (GGT), total, direct and indirect bilirubin, albumin and total proteins; quantified by the CHEMWELL-T automated biochemical analyzer. The Kruskall-Wallis test was used to compare the groups. In the pre and post moments in each group, the Wilcoxon rank sum test was used, and considering the time and group factors, generalized linear models were used. The results showed that there was a significant reduction in total and indirect bilirubin in the TFBC + RFS group (P = 0.015; P = 0.0014) and in ALT in the TFCM group (P = 0.029). However, there was an increase in AST in the TFBC group compared to CON and in FAL in the TFCM group compared to TFBC and CON and there were no significant changes in MC (P = 0.110), BMI (P = 0.312) and %F (P = 0.312). It is concluded that 16 weeks of TFBC + RFS was not sufficient to present significant changes in body composition variables, but was efficient in positively altering liver function markers in overweight elderly women, promoting the reduction of total and indirect bilirubin.