Autor(es)

Milioni, Fabio ; Millet, Guillaume Y. ; de Poli, Rodrigo Araujo Bonetti ; Brisola, Gabriel Motta Pinheiro ; Malta, Elvis de Souza ; Redkva, Paulo Eduardo ; Barbieri, Fabio Augusto ; Zagatto, Alessandro Moura

• Tipo de documento: Artigo Científico
• Fonte: SPORT SCIENCES FOR HEALTH; v. 20, n. 3, p. 10-pg., 2024-05-17.

Resumo

Purpose High-intensity long-interval training (long-HIIT; interval >= 1 min; intensity 85-100% of maximal oxygen uptake [V(over dot)O(2)max]) is often applied for cardiorespiratory adaptations; however, long-HIIT can also challenge the anaerobic and neuromuscular systems. Therefore, this study aimed to investigate the effects of 4-week long-HIIT (11 sessions) on anaerobic capacity, repeated sprint ability (RSA), and neuromuscular function. Methods Twenty active men (V(over dot)O(2)max: 44.8 +/- 5.3 mL.kg(-1).min(-1)) performed an incremental running test (T-INC), a supramaximal test consisting in running until the task failure at 115% of maximum velocity achieved in T-INC (V-INC) for anaerobic capacity determination, and an RSA test (2 x 6 x 35-m all-out sprints) pre- and post-HIIT. Before and after RSA, the neuromuscular function was assessed with counter movement jumps (CMJ) and knee extensors maximal isometric voluntary contractions (MVC) with femoral nerve electrical stimulation. Long-HIIT consisted of 10 x 1-min runs at 90% of V-INC with 1-min recovery. Results Long-HIIT induced significant increase in V(over dot)O(2)max (P = 0.0001). Although anaerobic capacity did not change significantly, 60% of the participants improved above the smallest worthwhile change (0.2 x standard deviation of pre-HIIT). The changes in sprint performance over RSA was significantly less post-HIIT than pre (P = 0.01). RSA induced significant drop of MVC, high frequency doublet, voluntary activation and CMJ performance at pre- and post-HIIT (P < 0.01); however, the percentage of reduction from rest to fatigued conditions were not significantly altered at post-HIIT compared to Pre. Conclusions 11 sessions of long-HIIT over 4-week improved maximal aerobic power but not anaerobic capacity, and neuromuscular function. Yet, neuromuscular fatigue was similar despite greater speeds reached during RSA. (AU)

• Processo FAPESP: 16/17836-2 - Efeitos da pós ativação neuromuscular induzida por saltos na capacidade anaeróbia em cicloergômetro
• Beneficiário: Rodrigo de Araujo Bonetti de Poli
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 17/21724-8 - Impacto do uso regular de imersão em água fria após sessões de treinamento intervalado de alta intensidade sobre o reparo tecidual, adaptação muscular e desempenho em corrida
• Beneficiário: Elvis de Souza Malta
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 16/02683-6 - Influência da suplementação de beta-alanina associado ao treinamento intervalado de alta intensidade no desempenho de sprints repetidos.
• Beneficiário: Fabio Milioni
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 17/03660-2 - O desenvolvimento do overreaching funcional é uma estratégia eficiente para melhorar a performance de nado no pólo aquático após o período de polimento?
• Beneficiário: Gabriel Motta Pinheiro Brisola
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 16/11076-6 - Suplementação de ²-alanina associado ao treinamento intervalado de alta intensidade no desempenho e na manifestação dos processos de fadiga central e periférica durante sprints repetidos
• Beneficiário: Alessandro Moura Zagatto
• Modalidade de apoio: Auxílio à Pesquisa - Regular