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Reliability of the 30-15 intermittent fitness test in semiprofessional soccer players

Thomas, C, Dos’Santos, T, Jones, PA and Comfort, P 2016, 'Reliability of the 30-15 intermittent fitness test in semiprofessional soccer players' , International Journal of Sports Physiology and Performance, 11 (2) , pp. 172-175.

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Abstract

Purpose: The purpose of this investigation was to determine the reliability of the 30-15 Intermittent Fitness Test (30-15IFT) in semiprofessional soccer players. Methods: Fourteen male semiprofessional soccer players performed the 30-15IFT on 2 occasions separated by 7 d. Reliability was assessed by intraclass correlation coefficient (ICC), typical error of measurement expressed as a coefficient of variation (CV), and smallest worthwhile change (SWC) to determine any significant difference between testing sessions. Results: Maximal intermittent running velocity (VIFT) demonstrated good reliability (ICC = .80) for between-sessions reliability. The CV was 2.5% for between-sessions reliability of the 30-15IFT. As the SWC (0.70 km/h) falls within the range in which the individual’s true score is likely to lie (1.0 km/h), the usefulness of the VIFT was rated as marginal. Despite the usefulness of the 30-15IFT being deemed marginal, a change in performance as small as 1.0 km/h (2 stages) in VIFT could be considered substantial or real. Conclusion: This study demonstrates that VIFT in the 30-15IFT is reliable, resulting in a reliable assessment of team-sport-specific cardiorespiratory fitness, with changes as small as 1.0 km/h (2 stages) in VIFT considered meaningful.

Item Type: Article
Schools: Schools > School of Health Sciences > Centre for Health Sciences Research
Journal or Publication Title: International Journal of Sports Physiology and Performance
Publisher: Human Kinetics
ISSN: 1555-0265
Related URLs:
Funders: Non funded research
Depositing User: Dr P Comfort
Date Deposited: 18 Mar 2016 17:43
Last Modified: 18 Mar 2016 17:43
URI: http://usir.salford.ac.uk/id/eprint/38158

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