9 meta-analyses
Physical · Practice
HIIT for Cardiometabolic Health
Two or three interval sessions a week: one way to carry out what the review summary this entry was written from reports: that HIIT lowers blood pressure and improves vascular function, lipids and vascular stiffness, comparably to moderate continuous training.
2–3×/week
IntermediateHome, gym, or supervised
Before you start
Coordinate with clinicians if on glucose- or blood-pressure-lowering medication
When to seek a professional
- Chest pain, pressure, or unusual shortness of breath during exertion
- Fainting, dizziness, or palpitations with exercise
- Known or suspected cardiovascular, metabolic, or renal disease without medical clearance
- Poorly controlled diabetes or hypertension
How to do it
2–3 interval sessions/week, ongoing
The research behind this entry establishes something about dose, but not these exact parameters; treat them as a practical way to apply the finding rather than as the finding itself.
Bike, treadmill, or bodyweightHigher body weightFor most adultsWith professional supervision
What the evidence says
What the sources say
This practice is one way to carry out what the sources on the concept entry (phys.cardio.hiit-cardiometabolic-health) studied: HIIT and cardiometabolic and vascular risk factors, blood pressure, flow-mediated dilation, lipids, arterial stiffness and mitochondrial markers, compared with moderate continuous training and controls. Edwards 2023 (meta-analysis, 97 studies, 3399 participants) reports a systolic blood pressure reduction of 4.08 mmHg and that HIIT can be an effective exercise mode for improving cardiometabolic health, particularly for reducing blood pressure in hypertensive individuals. Carpes 2021 (meta-analysis, 10 studies, 266 participants) reports that HIIT reduced blood pressure in older adults and that HIIT and MICT provided comparable reductions. Wood 2019 (meta-analysis, 26 studies, 823 participants) reports that HIIT appeared to significantly improve HDL cholesterol compared with MICT, and that “Neither HIIT nor MICT is superior for altering TC, TRG, or LDL-C, or TC-HDL-C ratio”. The full account, source by source, is on the concept entry this practice links to (phys.cardio.hiit-cardiometabolic-health).
Common misconceptions
- 'HIIT does nothing for metabolic conditions' (meta-analyses report blood-pressure reductions in hypertensive individuals (Edwards 2023) and improved endothelial function in overweight and obese adults (Sabouri 2022); clearance and clinician coordination are this entry's own cautions)
What we won't claim
- No cure claims for any disease
- No guaranteed outcomes or fixed numeric results for any individual
- Does not replace prescribed medical treatment
- Does not cure metabolic disease; supports risk-factor management
9 meta-analyses
- Agreement
- The review summary this entry was written from does not say whether its sources agree at this claim. Direction recorded for 7 of 9 sources; not yet recorded for the rest. A review summary is the written synthesis this entry was first built from; it is not one of the sources counted here.
- The claim's outcome
- Outcome not yet recorded
- Certainty
- A source states a certainty rating for 1 outcome.
What each source measured and concluded (9)
meta-analysis · 2023
Edwards et al. (2023) — High-Intensity Interval Training and Cardiometabolic Health in the General Population: A Systematic Review and Meta-Analysis of Randomised Controlled Trials
- What it measured
- Systolic blood pressure (sBP) and diastolic blood pressure (dBP)
- How it measured it
- Data from randomized controlled trials (RCTs) reporting changes in sBP and dBP
- Direction it states for the claim's outcome
- Improved
- How it was read
- read in full text
- What the review says it includes
- meta-analysis
- Studies and participants, as stated
- N = 3399 participants across 97 studies
- Heterogeneity, as stated
- Significant heterogeneity and publication bias
meta-analysis · 2021
Carpes et al. (2021) — High-intensity interval training reduces blood pressure in older adults: A systematic review and meta-analysis.
- What it measured
- Blood pressure (systolic and diastolic)
- Direction it states for the claim's outcome
- Improved
- How it was read
- read in full text
- What the review says it includes
- systematic review and meta-analysis
- Studies and participants, as stated
- N = 266 participants across 10 studies
meta-analysis · 2019
Way et al. (2019) — The effect of high Intensity interval training versus moderate intensity continuous training on arterial stiffness and 24h blood pressure responses: A systematic review and meta-analysis.
- What it measured
- Central arterial stiffness (via pulse wave velocity and augmentation index), 24-hour blood pressure responses (night-time diastolic and daytime systolic and diastolic BP).
- How it measured it
- Validated methods: pulse wave velocity and augmentation index for arterial stiffness; sphygmomanometers for BP.
- Direction it states for the claim's outcome
- Improved
- How it was read
- read in full text
- What the review says it includes
- meta-analysis, systematic review
- Studies and participants, as stated
- N = 346 participants across 7 studies
meta-analysis · 2022
Khalafi et al. (2022) — The impact of high-intensity interval training on vascular function in adults: A systematic review and meta-analysis
- What it measured
- Vascular function via brachial artery flow-mediated dilation (FMD).
- How it measured it
- Laboratory test; FMD is a validated measurement tool.
- How it was read
- read in full text
- What the review says it includes
- systematic review and meta-analysis
- Studies and participants, as stated
- N = 1,437 participants across 36 studies
- Heterogeneity, as stated
- LIMITATIONS: Significant heterogeneity in results; lack of studies using Sprint Interval Training (SIT).
meta-analysis · 2015
Ramos et al. (2015) — The Impact of High-Intensity Interval Training Versus Moderate-Intensity Continuous Training on Vascular Function: a Systematic Review and Meta-Analysis
- What it measured
- Vascular function via brachial artery flow-mediated dilation (FMD).
- How it measured it
- Brachial artery FMD, a validated method.
- Direction it states for the claim's outcome
- Improved
- How it was read
- read in full text
- What the review says it includes
- meta-analysis, systematic review
- Studies and participants, as stated
- N = 182 participants across 7 studies
meta-analysis · 2022
Sabouri et al. (2022) — High-intensity interval training improves the vascular endothelial function comparing moderate-intensity interval training in overweight or obese adults: A meta-analysis.
- What it measured
- Vascular endothelial function via flow-mediated dilation (FMD)
- How it measured it
- Laboratory test (flow-mediated dilation)
- Direction it states for the claim's outcome
- Improved
- How it was read
- read in full text
- What the review says it includes
- meta-analysis
- Studies and participants, as stated
- N = 208 participants across 8 studies
meta-analysis · 2019
Wood et al. (2019) — HIIT is not superior to MICT in altering blood lipids: a systematic review and meta-analysis
- What it measured
- Changes in blood lipid profiles: total cholesterol (TC), triglycerides (TRG), high-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C), and the TC/HDL-C ratio.
- How it measured it
- Pre-post intervention lipid measurements reported in mmol/L or mg/dL, likely through laboratory tests.
- How it was read
- read in full text
- What the review says it includes
- systematic review and meta-analysis
- Studies and participants, as stated
- N = 823 participants across 26 studies
meta-analysis · 2025
Jiao et al. (2025) — Effect of HIIT on hemostasis and vascular stiffness: a systematic review and meta-analysis of randomized controlled trials
- What it measured
- Platelet count (PLT), fibrinogen (FIB), D-dimer (D-D), carotid-femoral pulse wave velocity (cfPWV), augmentation index (AIx), AIx normalized to a heart rate of 75 beats·min−1 (AIx@75HR), flow-mediated dilation (FMD), and brachial flow-mediated dilation normalized (nFMD).
- How it measured it
- Standardized mean differences (SMD) of changes from baseline to post-intervention.
- Direction it states for the claim's outcome
- Improved
- How it was read
- read in full text
- What the review says it includes
- systematic review and meta-analysis
- Studies and participants, as stated
- N = 2,679 participants across 68 studies
meta-analysis · 2023
Hadjispyrou et al. (2023) — The Effect of High-Intensity Interval Training on Mitochondrial-Associated Indices in Overweight and Obese Adults: A Systematic Review and Meta-Analysis.
- What it measured
- Citrate synthase (CS), cytochrome C (COX-IV), beta-hydroxyacyl CoA-dehydrogenase (β-HAD), PGC-1α, SIRT1, mitochondrial respiratory chain complexes (Complex I-V), VO2max.
- How it measured it
- Data from multiple studies expressing these indices in terms of protein content, activity, gene expression, and mitochondrial respiratory capacity.
- Direction it states for the claim's outcome
- Improved
- How it was read
- read in full text
- What the review says it includes
- systematic review and meta-analysis
- Studies and participants, as stated
- N = 530 participants across 28 studies
Certainty ratings the sources state (1)
Hadjispyrou et al. (2023), for its own outcome
- Rating, as the source states it
- low
- Framework
- not named by the source
- Applies to
- Some primary outcomes were assessed with low-quality evidence
- Stated by
- Hadjispyrou et al. (2023)
Key sources (9)
Every source below is shown with its study design and links to the original study. This is the audit trail.
meta-analysisHigh-Intensity Interval Training and Cardiometabolic Health in the General Population: A Systematic Review and Meta-Analysis of Randomised Controlled Trials
meta-analysisHigh-intensity interval training reduces blood pressure in older adults: A systematic review and meta-analysis.
meta-analysisThe effect of high Intensity interval training versus moderate intensity continuous training on arterial stiffness and 24h blood pressure responses: A systematic review and meta-analysis.
meta-analysisThe impact of high-intensity interval training on vascular function in adults: A systematic review and meta-analysis
meta-analysisThe Impact of High-Intensity Interval Training Versus Moderate-Intensity Continuous Training on Vascular Function: a Systematic Review and Meta-Analysis
meta-analysisHigh-intensity interval training improves the vascular endothelial function comparing moderate-intensity interval training in overweight or obese adults: A meta-analysis.
meta-analysisHIIT is not superior to MICT in altering blood lipids: a systematic review and meta-analysis
meta-analysisEffect of HIIT on hemostasis and vascular stiffness: a systematic review and meta-analysis of randomized controlled trials
meta-analysisThe Effect of High-Intensity Interval Training on Mitochondrial-Associated Indices in Overweight and Obese Adults: A Systematic Review and Meta-Analysis.
Explore all 1,293 studies in Cardio & Endurance →
The full evidence base this focus area draws on, every study with its design and DOI.What it is for
Build cardio fitnessManage my weightProtect my heartSupport healthy blood sugar and metabolism