Key result
High-intensity interval training produced a larger post-exercise reduction in systolic blood pressure than continuous exercise in hypertensive (-20 vs -5 mmHg) and normotensive patients.
Why the study?
Does high-intensity interval training (HIIT) reduce post-exercise blood pressure more than continuous exercise in metabolic syndrome patients?
RCT (n=14)
random order
Does high-intensity interval training (HIIT) reduce post-exercise blood pressure more than continuous exercise in metabolic syndrome patients?
A single bout of high-intensity interval training acutely reduces systolic blood pressure more effectively than continuous exercise in patients with metabolic syndrome.
Answers are grounded in this paper and cite their sources.
Supports preferring HIIT for acute BP control in metabolic syndrome; extends RCT evidence to normotensives.
The purpose of this study was to compare the magnitude of post-exercise hypotension (PEH) after a bout of cycling exercise using high-intensity interval training (HIIT) in comparison to a bout of traditional moderate-intensity continuous exercise (CE). After supine rest 14 obese (31±1 kg·m−2) middle-age (57±2 y) metabolic syndrome patients (50% hypertensive) underwent a bout of HIIT or a bout of CE in a random order and then returned to supine recovery for another 45 min. Exercise trials were isocaloric and compared to a no-exercise trial (CONT) of supine rest for a total of 160 min. Before and after exercise we assessed blood pressure (BP), heart rate (HR), cardiac output (Q), systemic vascular resistance (SVR), intestinal temperature (TINT), forearm skin blood flow (SKBF) and percent dehydration. HIIT produced a larger post-exercise reduction in systolic blood pressure than CE in the hypertensive group (−20±6 vs. −5±3 mmHg) and in the normotensive group (−8±3 vs. −3±2 mmHg) while HIIT reduced SVR below CE (P<0.05). Percent dehydration was larger after HIIT, and post-exercise TINT and SKBF increased only after HIIT (all P<0.05). Our findings suggest that HIIT is a superior exercise method to CE to acutely reduce blood pressure in MSyn subjects.
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Morales‐Palomo et al. (2017) conducted an RCT in Metabolic syndrome (n=14). High-intensity interval training (HIIT) vs. Moderate-intensity continuous exercise (CE) and no-exercise (CONT) was evaluated on Post-exercise reduction in systolic blood pressure (p=<0.05). High-intensity interval training produced a larger post-exercise reduction in systolic blood pressure than continuous exercise in hypertensive (-20 vs -5 mmHg) and normotensive patients.
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