Augmented anabolic responses after 8-wk cycling with blood flow restriction

Journal article


Conceição, Miguel Soares, Mendes, Telles, Guilherme Defante, Libardi, Cleiton Augusto, Castro, Alex, Andrade, André L. L., Brum, Patrícia Chakur, Urias, Úrsula, Kurauti, Mirian Ayumi, Costa, Boschero, Antonio Carlos, Cavaglieri, Cláudia Regina, Camera, Donny M., Chacon-Mikahil, Mara Patricia Traina, Junior, Edson Manoel Mendes and Júnior, José Maria Costa. (2019) Augmented anabolic responses after 8-wk cycling with blood flow restriction. Medicine and Science in Sports and Exercise. 51(1), pp. 84 - 93. https://doi.org/10.1249/MSS.0000000000001755
AuthorsConceição, Miguel Soares, Mendes, Telles, Guilherme Defante, Libardi, Cleiton Augusto, Castro, Alex, Andrade, André L. L., Brum, Patrícia Chakur, Urias, Úrsula, Kurauti, Mirian Ayumi, Costa, Boschero, Antonio Carlos, Cavaglieri, Cláudia Regina, Camera, Donny M., Chacon-Mikahil, Mara Patricia Traina, Junior, Edson Manoel Mendes and Júnior, José Maria Costa
Abstract

Introduction: Low-intensity endurance training (ET) performed with blood flow restriction (BFR) can improve muscle strength, cross-sectional area (CSA) and cardiorespiratory capacity.Whether muscle strength and CSA as well as cardiorespiratory capacity (i.e.,V˙ O2max) and underlying molecular processes regulating such respective muscle adaptations are comparable to resistance and ET is unknown. Purpose: To determine the respective chronic (i.e., 8 wk) functional, morphological, and molecular responses of ET-BFR training compared with conventional, unrestricted resistance training (RT) and ET. Methods: Thirty healthy young men were randomly assigned to one of three experimental groups: ET-BFR (n = 10, 4 dIwkj1, 30-min cycling at 40% of V˙ O2max), RT (n = 10, 4 dIwkj1, 4 sets of 10 repetitions leg press at 70% of one repetition maximum with 60 s rest) or ET (n = 10, 4 dIwkj1, 30-min cycling at 70%ofV˙ O2max) for 8 wk. Measures of quadriceps CSA, leg press one repetition maximum, and V˙ O2max as well as muscle biopsies were obtained before and after intervention. Results: Both RT and ET-BFR increased muscle strength and hypertrophy responses. ET-BFR also increased V˙ O2max, total cytochrome c oxidase subunit 4 isoform 1 abundance and vascular endothelial growth factor mRNA abundance despite the lower work load compared to ET. Conclusions: Eight weeks of ET-BFR can increase muscle strength and induce similar muscle hypertrophy responses to RT while V˙ O2max responses also increased postintervention even with a significantly lower work load compared with ET. Our findings provide new insight to some of the molecular mechanisms mediating adaptation responses with ET-BFR and the potential for this training protocol to improve muscle and cardiorespiratory capacity.

Keywordsvascular occlusion; muscle hypertrophy; cell signaling; angiogenesis; low-intensity exercise
Year2019
JournalMedicine and Science in Sports and Exercise
Journal citation51 (1), pp. 84 - 93
PublisherLippincott Williams and Wilkins
ISSN0195-9131
Digital Object Identifier (DOI)https://doi.org/10.1249/MSS.0000000000001755
Scopus EID2-s2.0-85058518101
Page range84 - 93
Research GroupMary MacKillop Institute for Health Research
Grant ID2014/00985-0
2015/19756-3
Place of publicationUnited States of America
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