Differential muscle hypertrophy and edema responses between high‐load and low‐load exercise with blood flow restriction
| Autor: | Bergson de Almeida Peres, Thiago Lasevicius, Carla Silva-Batista, Vitor de Salles Painelli, Valmor Tricoli, Emerson Luiz Teixeira, Ariel Roberth Longo, Brad J. Schoenfeld, Fabiano Freitas Shiromaru, André Yui Aihara |
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| Rok vydání: | 2019 |
| Předmět: |
Adult
Male medicine.medical_specialty Adolescent TREINAMENTO DE FORÇA Physical Therapy Sports Therapy and Rehabilitation 030204 cardiovascular system & hematology Muscle damage Blood flow restriction Quadriceps Muscle Muscle hypertrophy Young Adult 03 medical and health sciences 0302 clinical medicine Muscle swelling Internal medicine Edema medicine Humans Orthopedics and Sports Medicine Muscle Strength medicine.diagnostic_test business.industry Resistance Training Magnetic resonance imaging Myalgia 030229 sport sciences Adaptation Physiological Constriction Magnetic Resonance Imaging Regional Blood Flow Cardiology Swelling medicine.symptom Range of motion business |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 1600-0838 0905-7188 |
| Popis: | We sought to determine whether early increases in cross-sectional area (CSA) of different muscles composing the quadriceps with low-load resistance training with blood flow restriction (LL-BFR) were mainly driven by muscle hypertrophy or by edema-induced swelling. We also compared these changes to those promoted by high-load resistance training (HL-RT). In a randomized within-subject design, fifteen healthy, untrained men were submitted to magnetic resonance imaging (MRI) for CSA and edema-induced muscle swelling assessment (fast spin echo inversion recovery, FSE-STIR). MRI was performed in LL-BFR and HL-RT at baseline (W0) and after 3 weeks (W3), with a further measure after 6 weeks (W6) for HL-RT. Participants were also assessed at these time points for indirect muscle damage markers (range of motion, ROM; muscle soreness, SOR). CSA significantly increased for all the quadriceps muscles, for both LL-BFR and HL-RT at W3 (all P .05) compared to W0. However, FSE-STIR was elevated at W3 for all the quadriceps muscles only for HL-RT (all P .0001), not LL-BFR (all P .05). Significant increases and decreases were shown in SOR and ROM, respectively, for HL-RT in W3 compared to W0 (both P .05), while these changes were mitigated at W6 compared to W0 (both P .05). No significant changes in SOR or ROM were demonstrated for LL-BFR across the study. Early increases in CSA with LL-BFR seem to occur without the presence of muscle edema, whereas initial gains obtained by HL-RT were influenced by muscle edema, in addition to muscle hypertrophy. |
| Databáze: | OpenAIRE |
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