Journal
APPLIED PHYSIOLOGY NUTRITION AND METABOLISM
Volume 48, Issue 11, Pages 863-869Publisher
CANADIAN SCIENCE PUBLISHING
DOI: 10.1139/apnm-2023-0173863
Keywords
hypertension; heat stress; heart rate variability; HRV; cardiac; exercise
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Short bouts of exercise-heat stress did not significantly disrupt heart rate variability in physically active individuals with hypertension compared to normotensives.
Impaired cardiac autonomic modulation is implicated in the development of hypertension. Exercise improves sympathovagal balance and is often prescribed for hypertension management. Environmental conditions, however, are not considered during the development of these exercise recommendations. We examined cardiac autonomic modulation, assessed using heart rate variability (HRV), in individuals (49-77 years) with (n = 20) and without (n = 28) controlled, uncomplicated hypertension performing three 30 min bouts of exercise (light, moderate, and vigorous) in dry heat (40.2 +/- 0.3 degrees C, 17% +/- 7% relative humidity), each separated by 15 min breaks. Regardless of intensity, short bouts of exercise-heat stress did not significantly disrupt HRV in physically active individuals with hypertension relative to normotensives.
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