alexa Mental Work Stimulates Cardiovascular Responses through a Reduction in Cardiac Parasympathetic Modulation in Men and Women
ISSN: 2167-7662

Bioenergetics: Open Access
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Research Article

Mental Work Stimulates Cardiovascular Responses through a Reduction in Cardiac Parasympathetic Modulation in Men and Women

Emilie Pérusse-Lachance1, Angelo Tremblay2, Jean-Philippe Chaput3, Paul Poirier4,7, Normand Teasdale2, Vicky Drapeau5, Caroline Sénécal6 and Patrice Brassard2,7*
1Department of Physical Activity Sciences, University of Quebec at Trois-Rivieres, Quebec, Canada
2Department of Kinesiology, Faculty of Medicine, Laval University, Quebec, Canada
3Healthy Active Living and Obesity Research Group, Children’s Hospital of Eastern Ontario Research Institute, Ontario, Canada
4Faculty of Pharmacy, Laval University, Quebec, Canada
5Department of Physical Education, Faculty of Education, Laval University, Quebec, Canada
6School of Psychology, Faculty of Social Sciences, Laval University, Quebec, Canada
7Research center of the Institut universitaire de cardiologie et de pneumologie de Québec, Quebec, Canada
Corresponding Author : Patrice Brassard
Department of Kinesiology, Faculty of Medicine PEPS
Laval University Quebec, Canada G1V 0A6
Tel: 418-656-2131 ext. 5621
Fax: 418-656-2908
E-mail: [email protected]
Received May 23, 2012; Accepted June 11, 2012; Published June 13, 2012
Citation: Pérusse-Lachance E, Tremblay A, Chaput JP, Poirier P, Teasdale N, et al. (2012) Mental Work Stimulates Cardiovascular Responses through a Reduction in Cardiac Parasympathetic Modulation in Men and Women. Bioenergetics 2: 107. doi:10.4172/2167-7662.1000107
Copyright: © 2012 Pérusse-Lachance E, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
 

Abstract

Mental Work (MW) stimulates Cardiovascular (CV) functions in healthy adults and a reduction in cardiac parasympathetic modulation could be one mechanism involved in such a response. The influence of sex on these CV responses remains ambiguous. The aim of the study was to evaluate CV impacts of MW in healthy individuals and whether sex influences CV responses induced by MW. The impact of a 45-min reading and writing session vs. a control condition, on Blood Pressure (BP), Heart Rate (HR), and Heart Rate Variability (HRV), was evaluated in 44 healthy adults with the use of a randomized crossover design. The influence of sex on those variables was then evaluated. Diastolic BP (74 ± 1 vs. 69 ± 1 mmHg; p < 0.05) and mean arterial pressure (MAP; 87 ± 7 vs. 83 ± 8 mmHg; p < 0.005), HR (68 ± 1 vs. 62 ± 1 bpm; p < 0.0001) and low frequency/high frequency ratio (2.8 ± 0.1 vs. 2.0 ± 0.1; p < 0.0001) were higher, while global HRV (SDNN: 84 ± 3 vs.104 ± 3 ms; p < 0.0001) and cardiac parasympathetic activity were lower during MW (p < 0.0001) vs. the control condition in the whole sample. During both experimental conditions, HR was higher (p < 0.0001), while BP, rMSSD, pNN50 and low frequency component of HRV were lower in women compared to men (all p < 0.05). The intensity of the cognitive demand and its influence on CV variables were comparable between men and women. These results support that MW increases BP and HR through decrement in cardiac parasympathetic modulation in healthy subjects and suggest that sex does not influence CV responses induced by cognitive demand of similar intensity.

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