Comparative effects of high-intensity and sprint interval training on cardiorespiratory fitness and body composition: a systematic review with meta-analysis.

ABSTRACT:

Background

Interval training modalities, including high-intensity interval training (HIIT) and sprint interval training (SIT), are widely recognized for their efficiency and health benefits. However, it remains unclear how baseline fitness levels influence the differential effects of HIIT and SIT on key health-related outcomes.

Objective

This meta-analysis aims to compare the effects of HIIT and SIT on cardiorespiratory fitness (CRF) and body fat mass, with subgroup analyses based on participants' health and training status.

Methods

Nine randomized controlled trials (n = 666) were included. Primary outcomes were changes in VO₂max/VO₂peak and body fat percentage. Data were synthesized using standard mean difference (SMD) or weighted mean differenc

SUBMITTER: Zhang D 

PROVIDER: S-EPMC12643836 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature