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European Journal of Applied Physiology

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01-01-2015 | Original Article

Greater autonomic modulation during post-exercise hypotension following high-intensity interval exercise in endurance-trained men and women

Authors: Anita T. Cote, Shannon S. D. Bredin, Aaron A. Phillips, Michael S. Koehle, Darren E. R. Warburton

Published in: European Journal of Applied Physiology | Issue 1/2015

Abstract

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.

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Title: Greater autonomic modulation during post-exercise hypotension following high-intensity interval exercise in endurance-trained men and women
Authors: Anita T. Cote
Shannon S. D. Bredin
Aaron A. Phillips
Michael S. Koehle
Darren E. R. Warburton
Publication date: 01-01-2015
Publisher: Springer Berlin Heidelberg
Published in: European Journal of Applied Physiology / Issue 1/2015
Print ISSN: 1439-6319
Electronic ISSN: 1439-6327
DOI: https://doi.org/10.1007/s00421-014-2996-5

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Greater autonomic modulation during post-exercise hypotension following high-intensity interval exercise in endurance-trained men and women

Abstract

Purpose

Methods

Results

Conclusions

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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