Eur J Appl Physiol DOI 10.1007/s00421-014-2996-5
ORIGINAL ARTICLE
Greater autonomic modulation during post‑exercise hypotension following high‑intensity interval exercise in endurance‑trained men and women Anita T. Cote · Shannon S. D. Bredin · Aaron A. Phillips · Michael S. Koehle · Darren E. R. Warburton
Received: 22 May 2014 / Accepted: 1 September 2014 © Springer-Verlag Berlin Heidelberg 2014
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, endurancetrained (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 beatby-beat blood pressure were collected before and 30 min post-exercise for determination of cardiovagal baroreflex Communicated by Keith Phillip George. A. T. Cote (*) · A. A. Phillips · D. E. R. Warburton Cardiovascular Physiology and Rehabilitation Laboratory, University of British Columbia, Rm. 205, Unit II Osborne Centre, 6108 Thunderbird Blvd, Vancouver, BC V6T 1Z3, Canada e-mail: [email protected] A. T. Cote · S. S. D. Bredin · A. A. Phillips · D. E. R. Warburton Physical Activity Promotion and Chronic Disease Prevention Unit, University of British Columbia, Vancouver, BC, Canada A. A. Phillips · D. E. R. Warburton Experimental Medicine Program, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada M. S. Koehle Environmental Physiology Laboratory, School of Kinesiology, University of British Columbia, Vancouver, BC, Canada M. S. Koehle Division of Sports Medicine, University of British Columbia, Vancouver, BC, Canada
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
ORIGINAL ARTICLE
Greater autonomic modulation during post‑exercise hypotension following high‑intensity interval exercise in endurance‑trained men and women Anita T. Cote · Shannon S. D. Bredin · Aaron A. Phillips · Michael S. Koehle · Darren E. R. Warburton
Received: 22 May 2014 / Accepted: 1 September 2014 © Springer-Verlag Berlin Heidelberg 2014
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, endurancetrained (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 beatby-beat blood pressure were collected before and 30 min post-exercise for determination of cardiovagal baroreflex Communicated by Keith Phillip George. A. T. Cote (*) · A. A. Phillips · D. E. R. Warburton Cardiovascular Physiology and Rehabilitation Laboratory, University of British Columbia, Rm. 205, Unit II Osborne Centre, 6108 Thunderbird Blvd, Vancouver, BC V6T 1Z3, Canada e-mail: [email protected] A. T. Cote · S. S. D. Bredin · A. A. Phillips · D. E. R. Warburton Physical Activity Promotion and Chronic Disease Prevention Unit, University of British Columbia, Vancouver, BC, Canada A. A. Phillips · D. E. R. Warburton Experimental Medicine Program, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada M. S. Koehle Environmental Physiology Laboratory, School of Kinesiology, University of British Columbia, Vancouver, BC, Canada M. S. Koehle Division of Sports Medicine, University of British Columbia, Vancouver, BC, Canada
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
