The Study
High-intensity interval training versus moderate-intensity continuous training on exercise capacity and health-related quality of life in patients with coronary artery disease: An updated systematic review and meta-analysis.
This study combines results from many smaller experiments where patients were randomly assigned to different exercise programs. It gives us a good idea of which type of exercise might work better, but the results aren’t super precise, so we can’t say for sure.
Analysis score
Maximum 100 for a systematic review with meta-analysis.
Where the score came from
This study compares two types of exercise in people with heart disease: short, intense workouts (HIIT) and longer, easier ones (MICT). It looks at how much each improves heart fitness and quality of life.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 542 / 100
Quality score
The highest quality evidence. Systematic reviews and meta-analyses that pool randomized controlled trials, giving the most reliable summary of experimental evidence.
Key takeaways
Summary
Based on the study abstract and findings.
- 1The small added benefit of HIIT disappears when workouts burn the same calories, suggesting total effort matters more than how it's split up.
- 2HIIT improved heart fitness by 2.11 mL/kg/min more than MICT.
- 3But when both workouts burned the same calories, the difference dropped to just 0.72 mL/kg/min and wasn't clear.
- 4No difference was found in quality of life.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Brazilian journal of physical therapy
Year
2024
Authors
M. Gomes-Neto, A. Durães, L. S. R. Conceição, C. M. Silva, B. P. Martinez, Vitor Oliveira Carvalho
Related Content
Claims (5)
Short, intense bursts of exercise (like sprinting) can boost heart and lung fitness just as well as longer, steady workouts — and take way less time.
Doing short bursts of intense exercise might boost heart fitness more than steady, moderate workouts for people with heart disease — on average by a small but measurable amount.
For people with heart disease, short bursts of intense exercise don’t seem to work much better than steady, moderate exercise when both burn the same number of calories — both help a bit, but the difference between them is tiny.
People with heart disease who did either short bursts of intense exercise or longer, steady workouts felt about the same in terms of how their physical, emotional, and social lives were affected — and the evidence we have isn't very strong.
For heart patients, how much total energy you burn during exercise might matter more than whether you do intense bursts or steady workouts — when both types burn the same calories, they seem to help your fitness just as much.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.