Greater autonomic modulation during post-exercise hypotension following high-intensity interval exercise in endurance-trained men and women
Deutscher übersetzter Titel: | Größere autonome Modulation während Bluthochdruck nach Belastung folgend hochintensivem Intervalltraining bei ausdauertrainierten Männern und Frauen |
---|---|
Autor: | Cote, Anita T.; Bredin, Shannon S.D.; Phillips, Aaron A.; Koehle, Michael S.; Warburton, Darren E.R. |
Erschienen in: | European journal of applied physiology |
Veröffentlicht: | 115 (2015), 1, S. 81-89, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Elektronische Ressource (online) Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 1439-6319, 0301-5548 |
DOI: | 10.1007/s00421-014-2996-5 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201606004093 |
Quelle: | BISp |
Abstract des Autors
Purpose
An acute reduction in blood pressure observed after a single bout of exercise is termed post-exercise hypotension (PEH). In contrast to moderate intensity aerobic exercise, little is known about the PEH response following high-intensity interval exercise. The present purpose is to assess how sex and training status impact PEH following high-intensity interval exercise.
Methods
Cardiac volumes and function via echocardiography were measured in 40 normotensive, endurance-trained (ET) and normally active (NA) men and women (Age +/- SD = 30.5 +/- 5.7) following high-intensity interval cycle exercise. Continuous measurements of ECG and beat-by-beat blood pressure were collected before and 30 min post-exercise for determination of cardiovagal baroreflex function (BRS and αLF), spectral analysis of heart rate and systolic blood pressure (SBP LF).
Results
Post-exercise systolic BP was significantly reduced from baseline, occurring to a greater degree in ET compared with NA (−12.9 vs. −5.3 mmHg, P = 0.008), while mean arterial pressure was similarly reduced in all groups (−4.6 mmHg, P = 0.003). Despite reduced SVI and TPRI, CI was increased post-exercise (P < 0.01). ET experienced a greater decrease in αLF (P = 0.037) and increase in SBP LF (P = 0.017) than NA. Lean body mass was a significant predictor of change in SBP LF (Std. β = 0.735, P = 0.008).
Conclusions
These results characterize greater depressions in cardiovagal baroreflex function, and increased sympathetic activity, following vigorous exercise in endurance-trained individuals compared with normally active participants. This heightened sympathovagal balance after high-intensity exercise may be a compensatory mechanism in response to greater peripheral blood flow demands following vigorous exercise.