Individual muscle hypertrophy in high-load resistance training with and without blood flow restriction: A near-infrared spectroscopy approach

Autor(es)

Bergamasco, Joao Guilherme Almeida ; Bittencourt, Diego ; Silva, Deivid Gomes ; Biazon, Thais Marina Pires de Campos ; Soligon, Samuel Domingos ; Oliveira, Ramon Martins ; Libardi, Cleiton Augusto

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF SPORTS SCIENCES; v. N/A, p. 7-pg., 2024-12-16.

Resumo

We aimed to compare individual hypertrophic responses to high-load resistance training (HL-RT) or high-load with blood flow restriction (HL-BFR). Furthermore, we investigated whether greater responsiveness to one of the protocols could be explained by acute changes in blood deoxyhemoglobin concentration (HHb) and total hemoglobin concentration (tHb) (proxy markers of metabolic stress). Ten untrained participants had their legs randomized into both HL-RT and HL-BFR and underwent 10 weeks of training. Muscle cross-sectional area (mCSA) was measured at baseline and post training, while HHb and tHb during the final session. Using a threshold of 2 x typical errors (3.24%) to compare protocols, five participants showed greater mCSA increases after HL-RT (16.44 +/- 7.90%) compared to HL-BFR (10.74 +/- 7.12%, p = 0.0054) and five did not respond better to HL-RT (8.95 +/- 10.83%) compared to HL-BFR (13.33 +/- 8.59%) (p = 0.3105). Additionally, HL-RT induced lower HHb (5855.78 +/- 12905.99; p = 0.0101) and tHb (-43169.70 +/- 37793.17; p = 0.0030) AUC values compared to HL-BFR (HHb: 39254.80 +/- 27020.15; tHb: 46309.40 +/- 31613.97). In conclusion, despite the higher levels of metabolic stress markers, most participants did not present greater muscle hypertrophy by combining blood flow restriction with HL-RT. (AU)

• Processo FAPESP: 24/12893-4 - As respostas agudas e crônicas dos receptores estrogênicos induzidas pelo treinamento de força estão associadas a hipertrofia muscular de mulheres?
• Beneficiário: João Guilherme Almeida Bergamasco
• Modalidade de apoio: Bolsas no Brasil - Programa Fixação de Jovens Doutores