Test–retest reliability of the 30–15 Intermittent Fitness Test: A systematic review

This review aimed to synthesize previous findings on the test–retest reliability of the 30–15 Intermittent Fitness Test (IFT). The literature searches were performed in 8 databases. Studies that examined the test–retest reliability of the 30–15 IFT and presented the intraclass correlation coefficient (ICC) and/or the coefficient of variation (CV) for maximal velocity and/or peak heart rate were included. The consensus-based standards for the...