Blood flow restricted and traditional resistance training performed to fatigue produce equal muscle hypertrophy.
Scand J Med Sci Sports
; 25(6): 754-63, 2015 Dec.
Article
em En
| MEDLINE
| ID: mdl-25603897
ABSTRACT
This study investigated the hypertrophic potential of load-matched blood-flow restricted resistance training (BFR) vs free-flow traditional resistance training (low-load TRT) performed to fatigue. Ten healthy young subjects performed unilateral BFR and contralateral low-load TRT elbow flexor dumbbell curl with 40% of one repetition maximum until volitional concentric failure 3 days per week for 6 weeks. Prior to and at 3 (post-3) and 10 (post-10) days post-training, magnetic resonance imaging (MRI) was used to estimate elbow flexor muscle volume and muscle water content accumulation through training. Acute changes in muscle thickness following an early vs a late exercise bout were measured with ultrasound to determine muscle swelling during the immediate 0-48 h post-exercise. Total work was threefold lower for BFR compared with low-load TRT (P < 0.001). Both BRF and low-load TRT increased muscle volume by approximately 12% at post-3 and post-10 (P < 0.01) with no changes in MRI-determined water content. Training increased muscle thickness during the immediate 48 h post-exercise (P < 0.001) and to greater extent with BRF (P < 0.05) in the early training phase. In conclusion, BFR and low-load TRT, when performed to fatigue, produce equal muscle hypertrophy, which may partly rely on transient exercise-induced increases in muscle water content.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Fluxo Sanguíneo Regional
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Músculo Esquelético
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Treinamento Resistido
Tipo de estudo:
Clinical_trials
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Diagnostic_studies
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Etiology_studies
Limite:
Adult
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Female
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Humans
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Male
Idioma:
En
Revista:
Scand J Med Sci Sports
Assunto da revista:
MEDICINA ESPORTIVA
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
Dinamarca