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Muscle damage responses to resistance exercise performed with high-load versus low-load associated with partial blood flow restriction in young women

Texto completo
Alvarez, Ieda Fernanda [1] ; Damas, Felipe [1] ; Pires de Biazon, Thais Marina [1] ; Miquelini, Maiara [1] ; Doma, Kenji [2] ; Libardi, Cleiton Augusto [1]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Univ Fed Sao Carlos, Dept Phys Educ, MUSCULAB Lab Neuromuscular Adaptat Resistance Tra, Sao Carlos, SP - Brazil
[2] James Cook Univ, Coll Healthcare Sci, Townsville, Qld - Australia
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: European Journal of Sport Science; v. 20, n. 1 MAY 2019.
Citações Web of Science: 0

The aim of this study was to compare if an acute exercise session of high-load resistance training (HL-RT, e.g. 70% of 1 repetition-maximum, 1 RM) induces a higher magnitude of muscle damage compared with a RT protocol with low-loads (e.g. 20% 1 RM) associated with partial blood flow restriction (LL-BFR), and investigate the recovery in the days after the protocols. We used an unilateral crossover research design in which 10 young women (22(2) y; 162(5) cm; 66(11) kg) performed HL-RT and LL-BFR in a randomized, counterbalanced manner with a minimum interval of 2 weeks between protocols. Indirect muscle damage markers were evaluated before and once a day for 4 days into recovery. Main results showed decreases of 8-12% at 24-48 h in maximal voluntary isometric and concentric contraction torques (P < 0.03), and changes in muscle architecture markers (P < 0.03) for HL-RT and LL-BFR, with no differences between protocols (P > 0.05). Moreover, delayed onset muscle soreness increased only after LL-BFR (P < 0.001). We conclude that an acute bout of low volume HL-RT or LL-BFR to failure resulted in edema-induced muscle swelling, but do not induce major or long-lasting decrements in muscle function and the level of soreness promoted from LL-BFR was mild. (AU)

Processo FAPESP: 16/24259-1 - Individualidade biológica humana versus variáveis do treinamento de força: o que realmente importa para a hipertrofia muscular?
Beneficiário:Felipe Romano Damas Nogueira
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 13/21218-4 - O papel da magnitude de dano muscular nas respostas hipertróficas
Beneficiário:Cleiton Augusto Libardi
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 18/13064-0 - Respostas individuais da síntese de proteína muscular à modulação de variáveis de treinamento de força
Beneficiário:Felipe Romano Damas Nogueira
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado