Cardiac Autonomic and Physiological Responses to Moderate- intensity Exercise in Hypoxia

Cardiac Autonomic and Physiological Responses to Moderate- intensity Exercise in Hypoxia

Detalles Bibliográficos
Parent link:International Journal of Sports Medicine
Vol. 40, iss. 14.— 2019.— [P. 886-896]
Autor Corporativo: Национальный исследовательский Томский политехнический университет (ТПУ) Школа базовой инженерной подготовки (ШБИП) Отделение физической культуры (ОФК)
Outros autores: Fornasiero A. Alessandro, Skafidas S. Spyros, Stella F. Federico, Zignoli A. Andrea, Savoldelli A. Aldo, Rakobowchuk M. Mark, Pellegrini B. Barbara, Schena F. Federico, Mourot L. Laurent
Summary:Title screen
Exercise physiological responses can be markedly affected by acute hypoxia. We investigated cardiac autonomic and physiological responses to different hypoxic training protocols. Thirteen men performed three exercise sessions (5?5-min; 1-min passive recovery): normoxic exercise at 80% of the power output (PO) at the first ventilatory threshold (N), hypoxic exercise (FiO2=14.2%) with the same PO as N (HPO) and hypoxic exercise at the same heart rate (HR) as N (HHR). PO was lower in HHR (21.1±9.3%) compared to N and HPO. Mean HR was higher in HPO (154±11?bpm, p<0.01) than N and HHR (139±10 vs. 138±9?bpm; p=0.80). SpO2 was reduced (p<0.01) to a similar extent (p>0.05) in HPO and HHR compared to N. HR recovery (HRR) and HR variability indices were similar in N and HHR (p>0.05) but reduced in HPO (p<0.05), mirroring a delayed parasympathetic reactivation. Blood lactate and ventilation were similar in N and HHR (p>0.05) and increased in HPO (p<0.001). During recovery oxygen consumption and ventilation were similar in N and HHR (p>0.05) and increased in HPO (p<0.01). Moderate HR-matched hypoxic exercise triggers similar cardiac autonomic and physiological responses to normoxic exercise with a reduced mechanical load. On the contrary, the same absolute intensity exercise in hypoxia is associated with increased exercise-induced metabolic stress and delayed cardiac autonomic recovery.
Режим доступа: по договору с организацией-держателем ресурса
Idioma:inglés
Publicado: 2019
Subjects:
электронный ресурс
труды учёных ТПУ
heart rate recovery - hypoxia - post-exercise recovery
hypoxic exercise - cardiac autonomic activity
восстановление
сердечные ритмы
гипоксия
Acceso en liña:https://doi.org/10.1055/a-1015-0647
Formato: Electrónico Capítulo de libro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=662470

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