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Biological sex does not influence the peak cardiac output response to twelve weeks of sprint interval training.
Bostad, William; Williams, Jennifer S; Van Berkel, Emily K; Richards, Douglas L; MacDonald, Maureen J; Gibala, Martin J.
Afiliación
  • Bostad W; Department of Kinesiology, McMaster University, Ivor Wynne Centre, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada.
  • Williams JS; Department of Kinesiology, McMaster University, Ivor Wynne Centre, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada.
  • Van Berkel EK; Department of Kinesiology, McMaster University, Ivor Wynne Centre, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada.
  • Richards DL; Department of Medicine, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada.
  • MacDonald MJ; Department of Kinesiology, McMaster University, Ivor Wynne Centre, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada.
  • Gibala MJ; Department of Kinesiology, McMaster University, Ivor Wynne Centre, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada. gibalam@mcmaster.ca.
Sci Rep ; 13(1): 22995, 2023 12 27.
Article en En | MEDLINE | ID: mdl-38151488
ABSTRACT
Sprint interval training (SIT) increases peak oxygen uptake (V̇O2peak) but the mechanistic basis is unclear. We have reported that 12 wk of SIT increased V̇O2peak and peak cardiac output (Q̇peak) and the changes in these variables were correlated. An exploratory analysis suggested that Q̇peak increased in males but not females. The present study incorporated best practices to examine the potential influence of biological sex on the Q̇peak response to SIT. Male and female participants (n = 10 each; 21 ± 4 y) performed 33 ± 2 sessions of SIT over 12 wk. Each 10-min session involved 3 × 20-s 'all-out' sprints on an ergometer. V̇O2peak increased after SIT (3.16 ± 1.0 vs. 2.89 ± 1.0 L/min, η2p = 0.53, p < 0.001) with no sex × time interaction (p = 0.61). Q̇peak was unchanged after training (15.2 ± 3.3 vs. 15.1 ± 3.0 L/min, p = 0.85), in contrast to our previous study. The peak estimated arteriovenous oxygen difference increased after training (204 ± 30 vs. 187 ± 36 ml/L, p = 0.006). There was no effect of training or sex on measures of endothelial function. We conclude that 12 wk of SIT increases V̇O2peak but the mechanistic basis remains unclear. The capacity of inert gas rebreathing to assess changes in Q̇peak may be limited and invasive studies that use more direct measures are needed.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Entrenamiento de Intervalos de Alta Intensidad Límite: Female / Humans / Male Idioma: En Revista: Sci Rep Año: 2023 Tipo del documento: Article País de afiliación: Canadá Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Entrenamiento de Intervalos de Alta Intensidad Límite: Female / Humans / Male Idioma: En Revista: Sci Rep Año: 2023 Tipo del documento: Article País de afiliación: Canadá Pais de publicación: Reino Unido