Delayed parasympathetic reactivation and sympathetic withdrawal following maximal cardiopulmonary exercise testing (CPET) in hypoxia

Delayed parasympathetic reactivation and sympathetic withdrawal following maximal cardiopulmonary exercise testing (CPET) in hypoxia

Bibliographic Details
Parent link:European Journal of Applied Physiology
Vol. 118, iss. 10.— 2018.— [P. 2189-2201]
Corporate Author: Национальный исследовательский Томский политехнический университет Школа базовой инженерной подготовки Отделение физической культуры
Other Authors: Fornasiero A. Alessandro, Savoldelli A. Aldo, Skafidas S. Spyros, Stella F. Federico, Bortolan L. Lorenzo, Boccia G. Gennaro, Zignoli A. Andrea, Schena F. Federico, Mourot L. Laurent, Pellegrini B. Barbara
Summary:Title screen
Purpose This study investigated the effects of acute hypoxic exposure on post-exercise cardiac autonomic modulation following maximal cardiopulmonary exercise testing (CPET). Methods Thirteen healthy men performed CPET and recovery in normoxia (N) and normobaric hypoxia (H) (FiO2=13.4%, 3500 m). Post-exercise cardiac autonomic modulation was assessed during recovery (300 s) through the analysis of fastphase and slow-phase heart rate recovery (HRR) and heart rate variability (HRV) indices. Results Both short-term, T30 (mean difference (MD) 60.0 s, 95% CI 18.2-101.8, p=0.009, ES 1.01), and long-term, HRRt (MD 21.7 s, 95% CI 4.1-39.3, p=0.020, ES 0.64), time constants of HRR were higher in H. Fast-phase (30 and 60 s) and slow-phase (300 s) HRR indices were reduced in H either when expressed in bpm or in percentage of HRpeak (p0.05). Conclusions Affected fast-phase, slow-phase HRR and HRV indices suggested delayed parasympathetic reactivation and sympathetic withdrawal after maximal exercise in hypoxia. However, a similar cardiac autonomic recovery was re-established within 5 min after exercise cessation. These findings have several implications in cardiac autonomic recovery interpretation and in HR assessment in response to high-intensity hypoxic exercise.
Режим доступа: по договору с организацией-держателем ресурса
Published: 2018
Subjects:
электронный ресурс
труды учёных ТПУ
heart rate recovery
hypoxia
post-exercise recovery
hypoxic exercise
cardiac autonomic activity
восстановление
пульс
гипоксия
тренировки
вегетативные функции
сердечная деятельность
Online Access:https://doi.org/10.1007/s00421-018-3945-5
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664261
Description
Summary:Title screen
Purpose This study investigated the effects of acute hypoxic exposure on post-exercise cardiac autonomic modulation following maximal cardiopulmonary exercise testing (CPET). Methods Thirteen healthy men performed CPET and recovery in normoxia (N) and normobaric hypoxia (H) (FiO2=13.4%, 3500 m). Post-exercise cardiac autonomic modulation was assessed during recovery (300 s) through the analysis of fastphase and slow-phase heart rate recovery (HRR) and heart rate variability (HRV) indices. Results Both short-term, T30 (mean difference (MD) 60.0 s, 95% CI 18.2-101.8, p=0.009, ES 1.01), and long-term, HRRt (MD 21.7 s, 95% CI 4.1-39.3, p=0.020, ES 0.64), time constants of HRR were higher in H. Fast-phase (30 and 60 s) and slow-phase (300 s) HRR indices were reduced in H either when expressed in bpm or in percentage of HRpeak (p0.05). Conclusions Affected fast-phase, slow-phase HRR and HRV indices suggested delayed parasympathetic reactivation and sympathetic withdrawal after maximal exercise in hypoxia. However, a similar cardiac autonomic recovery was re-established within 5 min after exercise cessation. These findings have several implications in cardiac autonomic recovery interpretation and in HR assessment in response to high-intensity hypoxic exercise.
Режим доступа: по договору с организацией-держателем ресурса
DOI:10.1007/s00421-018-3945-5

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