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Intercostal Muscles Oxygenation and Breathing Pattern during Exercise in Competitive Marathon Runners.
Contreras-Briceño, Felipe; Espinosa-Ramírez, Maximiliano; Moya-Gallardo, Eduardo; Fuentes-Kloss, Rodrigo; Gabrielli, Luigi; Araneda, Oscar F; Viscor, Ginés.
Afiliação
  • Contreras-Briceño F; Laboratory of Exercise Physiology, Department of Health Science, Faculty of Medicine, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Santiago 7820436, Chile.
  • Espinosa-Ramírez M; Physiology Section, Department of Cell Biology, Physiology and Immunology, Faculty of Biology, Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain.
  • Moya-Gallardo E; Advanced Center for Chronic Diseases (ACCDiS), Division of Cardiovascular Diseases, Faculty of Medicine, Pontificia Universidad Católica de Chile, Av. Sergio Livingstone 1007, Santiago 8380000, Chile.
  • Fuentes-Kloss R; Laboratory of Exercise Physiology, Department of Health Science, Faculty of Medicine, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Santiago 7820436, Chile.
  • Gabrielli L; Laboratory of Exercise Physiology, Department of Health Science, Faculty of Medicine, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Santiago 7820436, Chile.
  • Araneda OF; Laboratory of Exercise Physiology, Department of Health Science, Faculty of Medicine, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Santiago 7820436, Chile.
  • Viscor G; Laboratory of Exercise Physiology, Department of Health Science, Faculty of Medicine, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Santiago 7820436, Chile.
Article em En | MEDLINE | ID: mdl-34444039
The study aimed to evaluate the association between the changes in ventilatory variables (tidal volume (Vt), respiratory rate (RR) and lung ventilation (V.E)) and deoxygenation of m.intescostales (∆SmO2-m.intercostales) during a maximal incremental exercise in 19 male high-level competitive marathon runners. The ventilatory variables and oxygen consumption (V.O2) were recorded breath-by-breath by exhaled gas analysis. A near-infrared spectroscopy device (MOXY®) located in the right-hemithorax allowed the recording of SmO2-m.intercostales. To explore changes in oxygen levels in muscles with high demand during exercise, a second MOXY® records SmO2-m.vastus laterallis. The triphasic model of exercise intensity was used for evaluating changes in SmO2 in both muscle groups. We found that ∆SmO2-m.intercostales correlated with V.O2-peak (r = 0.65; p = 0.002) and the increase of V.E (r = 0.78; p = 0.001), RR (r = 0.54; p = 0.001), but not Vt (p = 0.210). The interaction of factors (muscles × exercise-phases) in SmO2 expressed as an arbitrary unit (a.u) was significant (p = 0.005). At VT1 there was no difference (p = 0.177), but SmO2-m.intercostales was higher at VT2 (p < 0.001) and V.O2-peak (p < 0.001). In high-level competitive marathon runners, the m.intercostales deoxygenation during incremental exercise is directly associated with the aerobic capacity and increased lung ventilation and respiratory rate, but not tidal volume. Moreover, it shows less deoxygenation than m.vastus laterallis at intensities above the aerobic ventilatory threshold.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Músculos Intercostais / Teste de Esforço Tipo de estudo: Prognostic_studies Limite: Humans / Male Idioma: En Revista: Int J Environ Res Public Health Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Chile País de publicação: Suíça

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Músculos Intercostais / Teste de Esforço Tipo de estudo: Prognostic_studies Limite: Humans / Male Idioma: En Revista: Int J Environ Res Public Health Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Chile País de publicação: Suíça