Influência da proteína de soja e dos exercícios com pesos sobre o gasto energético de repouso de mulheres na pós-menopausa

Abstract

OBJECTIVE: The main objective of this study was to analyze the influence of soy protein ingestion and exercises with weights, on resting energy expenditure (REE) of women in post-menopause. METHODS: Clinical trial, 16 weeks, involving 60 women, 59 (7) years, distributed in 4 groups: G1 (soy protein and exercise), G2 (placebo and exercise), 3 (soy protein and without exercise) and 4 (placebo and without exercise). Randomly, soy protein and placebo (maltodextrin) were distributed in powder form, in portions of 25 grams/ day. There were 10 exercises with weights, performed in 3 sessions a week with 3 sets of 8-12 repetitions each, load of 60-80% of 1 maximum repetition (RM). The REE was calculated from the O2 and CO2, obtained through indirect calorimetry (Quinton QMC®) for 30 minutes under controlled temperature and humidity. For statistical analysis, ANOVA, Student's t test and multiple regression were used with the software Stata 9.2, α<0.05. RESULTS: Women presented homogeneity in all variables of the study. Significantly, there was an increase of the REE (p <0.05) in G1 (158 kcal/ day) and G2 (110 kcal/ day), corresponding to 17% and 9%, respectively, while G4 decreased by 4% (p<0.05). CONCLUSION: Exercises with weights are determinants for increase in resting energy expenditure of women in post-menopause, and can be potentiaized by ingestion of soy protein.