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Int J Sports Med 2016; 37(11): 855-862
DOI: 10.1055/s-0042-104197
Training & Testing
© Georg Thieme Verlag KG Stuttgart · New York

Acute Hypotensive Response to Continuous and Accumulated Isocaloric Aerobic Bouts

F. Cunha
1   Laboratory of Physical Activity and Health Promotion, Rio de Janeiro State University, Rio de Janeiro, Brazil
,
A. W. Midgley
2   Sport and Physical Activity, Ormskirk, Edgehill University, United Kingdom of Great Britain and Northern Ireland
,
L. Pescatello
3   School of Allied Health, University of Connecticut, Storrs, United States
,
P. P. Soares
4   Department of Physiology and Pharmacology, Fluminense Federal University, Rio de Janeiro, Brazil
,
P. Farinatti
5   School of Physical Education, Rio de Janeiro State University, Rio de Janeiro, Brazil
› Author Affiliations
Further Information

Publication History



accepted after revision 23 February 2016

Publication Date:
23 August 2016 (online)

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Abstract

Evidence indicates that chronic reductions in blood pressure (BP) due to aerobic exercise depend on the ability to induce post-exercise hypotension (PEH) after each training bout. The purpose of this study was to investigate PEH after isocaloric bouts of continuous and accumulated running. 10 healthy pre-hypertensive men (aged 27.6±3.5 years) performed the following bouts of exercise: a) A continuous bout (CONT) expending a total of 400 kcal; and b) An accumulated bout split into 2×200 kcal (INTER1 and INTER2) to total 400 kcal at 75% of oxygen uptake reserve. BP, mean arterial pressure (MAP) and heart rate variability were monitored 10 min before and 60 min after control and all exercise conditions. The decrease in MAP over time after continuous (400 kcal) and accumulated (2×200 kcal) bouts of exercise was more pronounced than during control (mean diff between 1.6 and 5.4 mmHg, P≤0.01), although the magnitude of change was similar between continuous and accumulated bouts (mean diff=0.1 mmHg, P=0.79). Concomitant to the PEH, sympathovagal balance was inversely related to changes in MAP after isocaloric bouts performed continuously and cumulatively (r=− 0.72 and−0.85, P=0.019 and 0.002, respectively). In conclusion, BP decreased to similar levels after continuous and accumulated acute aerobic exercise matched for total energy expenditure. Our findings also indicate that the recovery pattern of cardiac autonomic activity may have an important role in eliciting PEH.

Key words

aerobic training - blood pressure - energy expenditure - heart rate variability - parasympathetic modulation - sympathetic modulation
 

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