High-intensity interval exercise promotes post-exercise hypotension of greater magnitude compared to moderate-intensity continuous exercise

Abstract

PurposePhysical exercise is associated with reduced blood pressure (BP). Moderate-intensity continuous exercise (MCE) promotes post-exercise hypotension (PEH), which is highly recommended to hypertensive patients. However, recent studies with high-intensity interval exercise (HIIE) have shown significant results in cardiovascular disease. Thus, this study aimed to analyze PEH in hypertensive subjects submitted to HIIE and compare it to post MCE hypotension.Methods20 hypertensive adults (51\u2009±\u20098\xa0years), treated with antihypertensive medications, were submitted to two different exercise protocols and a control session. The MCE was performed at 60–70% of VO2 reserve, while HIIE was composed of five bouts of 3\xa0min at 85–95% VO2 reserve with 2\xa0min at 50% of VO2 reserve. The following variables were evaluated during exercise, pre- and post-session: clinical BP, heart rate (HR), double product, perception of effort, body mass, height and body mass index.ResultsSystolic BP decreased after exercise in both sessions, showing greater decrease after HIIE (−\u20097\u2009±\u200910 and −\u200911\u2009±\u200912\xa0mmHg, after MCE and HIIE, respectively, p\u2009≤\u20090.01). Diastolic BP also decreased after both sessions, but there were no significant differences between the two sessions (−\u20094\u2009±\u20098 and −\u20097\u2009±\u20098\xa0mmHg, after MCE and HIIE, respectively).ConclusionBoth exercise sessions produced PEH, but HIIE generated a greater magnitude of hypotension. The HIIE protocol performed in this study caused a greater cardiovascular stress during exercise; however, it was safe for the studied population and efficient for reducing BP after exercise.