Efeitos do exercício físico resistido sobre a função vascular e pressão arterial em ratos : uma revisão sistemática e meta-análise ; Effects of resistance exercise on vascular function and blood pressure in rats : a systematic review and meta-analysis

Meta-analyses with preclinical studies are relatively new and promote guidelines for clinical studies. The literature has showed that the effects of resistance exercise on the cardiovascular system in experimental models are still controversy. The aim of this metaanalysis was to evaluate the effects of resistance exercise on vascular function and blood pressure in rats. Different databases were searched for studies evaluating the effects of resistance exercise on vascular sensitivity, maximal response and blood pressure in rats up to September 30, 2014. Post intervention between-group effect sizes were pooled with the generic inverse variance method using random-effect model and expressed as standardized mean difference, Hedges g, with 95% confidence intervals (95% CI). Thirteen eligible studies were included. Our meta-analysis showed that resistance exercise in rats does not alter the vascular sensitivity, but promotes increased vascular relaxation (p<0.01). In addition, we observed a reduction in blood pressure in the exercised animals (p<0.01). Subgroup analysis showed that squat exercise (p<0.01), with low volumes of resistance exercise (p<0.05) and with moderate/high intensity (p<0.001) reduces the blood pressure. The results of this meta-analysis suggests that resistance exercise improves the vascular function and decreases the blood pressure in rats. However, further studies are needed to better understand the effects of different resistance exercise protocols on the cardiovascular system. ; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior ; Meta-análises com estudos pré-clínicos são relativamente novas e promovem diretrizes para os estudos clínicos. A literatura demonstra que os efeitos do exercício resistido sobre o sistema cardiovascular em modelos experimentais ainda são controversos. O objetivo desta meta-análise foi avaliar os efeitos do exercício resistido sobre a função vascular e pressão arterial em ratos. Foram investigados diferentes bancos de dados buscando estudos ...