Prevention & lipidsMeta-analysis
A systematic review and cluster analysis approach of 103 studies of high-intensity interval training on cardiorespiratory fitness
- Umbrella review (systematic review of systematic reviews and meta-analyses) with cluster analysis
- principal component analysis
- two-step cluster analysis
- AMSTAR 2 risk-of-bias assessment
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)
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:10.1093/eurjpc/zwad309
Summarised from the published abstract; every number is checked against it