A systematic review and cluster analysis approach of 103 studies of high-intensity interval training on cardiorespiratory fitness
Authors' conclusion
All three HIIT modalities produced significant improvements of CRF, although some modalities showed greater changes for some specific age groups or intensity indicators.
Study context
- Population
- Systematic reviews and meta-analyses of high-intensity interval training (HIIT) on cardiorespiratory fitness (CRF) in the entire study population (PubMed, Web of Science, inception to 31 October 2022)19 reviews · 103 studies
- Comparison
- Three HIIT modalities identified by clustering
- Outcome
- Cardiorespiratory fitness (CRF)
Methodological detailsprincipal component analysis, two-step cluster analysis, AMSTAR 2 risk-of-bias assessment
- Principal component analysis
- Two-step cluster analysis
- AMSTAR 2 risk-of-bias assessment
Pooled result
As reported in the abstract
CRF by HIIT modality
- Similar effectiveness in increasing CRF among the three HIIT modalities
Further pooled results
CRF by sex, weight status, study design, baseline physical activity level (subgroups)
- No significant differences
- P > 0.05
CRF by age group and exercise intensity indicator (subgroups)
- Differences observed
- P < 0.05
Original publication
A systematic review and cluster analysis approach of 103 studies of high-intensity interval training on cardiorespiratory fitness. Eur J Prev Cardiol. Published 21 September 2023. doi:10.
Summarised from the published abstract; every number is checked against it