Blood Flow Restriction Does Not Promote Additional Effects on Muscle Adaptations When Combined With High-Load Resistance Training Regardless of Blood Flow Restriction Protocol
| Autor: | Emerson Luiz Teixeira, Valmor Tricoli, Hamilton Roschel, André Yui Aihara, Vitor de Salles Painelli, Carlos Ugrinowitsch, Carla Silva-Batista, Fabiano Nassar Cardoso |
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| Rok vydání: | 2021 |
| Předmět: |
Male
medicine.medical_specialty Physical Therapy Sports Therapy and Rehabilitation Isometric exercise Electromyography 030204 cardiovascular system & hematology Blood flow restriction Quadriceps Muscle Muscle hypertrophy 03 medical and health sciences 0302 clinical medicine Isometric Contraction Internal medicine One-repetition maximum medicine Humans Orthopedics and Sports Medicine Muscle Strength Muscle Skeletal medicine.diagnostic_test business.industry Resistance training Resistance Training 030229 sport sciences General Medicine Regional Blood Flow Cardiology Muscle strength medicine.symptom business Muscle contraction |
| Zdroj: | Journal of Strength and Conditioning Research. 35:1194-1200 |
| ISSN: | 1064-8011 1194-1200 |
| Popis: | Teixeira, EL, Ugrinowitsch, C, de Salles Painelli, V, Silva-Batista, C, Aihara, AY, Cardoso, FN, Roschel, H, and Tricoli, V. Blood flow restriction does not promote additional effects on muscle adaptations when combined with high-load resistance training regardless of blood flow restriction protocol. J Strength Cond Res 35(5): 1194-1200, 2021-The aim of this study was to investigate, during high-load resistance training (HL-RT), the effect of blood flow restriction (BFR) applied during rest intervals (BFR-I) and muscle contractions (BFR-C) compared with HL-RT alone (no BFR), on maximum voluntary isometric contraction (MVIC), maximum dynamic strength (one repetition maximum [1RM]), quadriceps cross-sectional area (QCSA), blood lactate concentration ([La]), and root mean square of the surface electromyography (RMS-EMG) responses. Forty-nine healthy and untrained men (25 ± 6.2 years, 178.1 ± 5.3 cm and 78.8 ± 11.6 kg) trained twice per week, for 8 weeks. One leg of each subject performed HL-RT without BFR (HL-RT), whereas the contralateral leg was randomly allocated to 1 of 2 unilateral knee extension protocols: BFR-I or BFR-C (for all protocols, 3 × 8 repetitions, 70% 1RM). Maximum voluntary isometric contraction, 1RM, QCSA, and acute changes in [La] and RMS-EMG were assessed before and after training. The measurement of [La] and RMS-EMG was performed during the control sessions with the same relative load obtained after the 1RM test, before and after training. Similar increases in MVIC, 1RM, and QCSA were demonstrated among all conditions, with no significant difference between them. [La] increased for all protocols in pre-training and post-training, but it was higher for BFR-I compared with the remaining protocols. Increases in RMS-EMG occurred for all protocols in pre-training and post-training, with no significant difference between them. In conclusion, despite of a greater metabolic stress, BFR inclusion to HL-RT during rest intervals or muscle contraction did not promote any additive effect on muscle strength and hypertrophy. |
| Databáze: | OpenAIRE |
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