Strength training with and without arteriovenous blood flow restriction improves performance, regardless of changes in muscle hypertrophy, in Wistar rats

Autor(es)

NÁDIA F. GARCIA ^[1] ; CAMILA DE MORAES ^[2] ; MACÁRIO A. REBELO ^[3] ; SAVANAH MARIA G.R. PETERS ^[4] ; FÁBIO M.P. DE CASTRO ^[5] ; ENRICO F. PUGGINA

Afiliação do(s) autor(es)

^[1] University of São Paulo (USP). School of Medicine - Brasil

^[2] University of São Paulo (USP). School of Physical Education and Sport of Ribeirão Preto - Brasil

^[3] University of São Paulo (USP). School of Physical Education and Sport of Ribeirão Preto - Brasil

^[4] University of São Paulo (USP). School of Physical Education and Sport of Ribeirão Preto - Brasil

^[5] University of São Paulo (USP). School of Medicine - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Anais da Academia Brasileira de Ciências; v. 94, 2022-10-03.

Resumo

Abstract Strength training (ST) with blood flow restriction (BFR) is known to promote increases in hypertrophy and strength sometimes similar to traditional ST despite the effects of the arterial BFR on muscle adaptations and safety are not well established. The aim of this study was to assess whether ST with arterial BFR is able to improve muscular adaptations, performance and its safety in Wistar rats. Animals aging 8 weeks were divided in four groups: sedentary sham (S/S), sedentary with arterial BFR (S/BFR), trained sham (T/S), and trained with arterial BFR (T/BFR). Training protocol consisted of four weeks of ST composed by six sets of 10 ladder climbing with 50% of 1 maximal voluntary contraction. Body weight, epididymal fat, maximum loaded weight, manual grip strength, muscular hypertrophy index, systolic blood pressure, enzyme activity of superoxide dismutase, nitrite/nitrate concentration and tumor necrosis factor alpha were analyzed. The BFR rate was between 36% and 38%. T/BRF was effective to promote strength and hypertrophy. T/S is an alternative to improve strength, but it did not promote hypertrophy. Furthermore, we found no significant cardiac and metabolic changes. Thus, T/BFR is able to improve muscle adaptations and performance in rats, without causing cardiovascular and metabolic damage. (AU)

• Processo FAPESP: 17/13348-6 - Efeito do treinamento de força com oclusão vascular na reatividade vascular da aorta abdominal em ratos wistar
• Beneficiário: Enrico Fuini Puggina
• Modalidade de apoio: Auxílio à Pesquisa - Regular