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The reliability and validity of a soccer-specific non-motorised treadmill simulation (iSPT)

Aldous, Jeffrey W. F.; Akubat, Ibrahim; Chrismas, Bryna C. R.; Watkins, Samuel L.; Mauger, Alexis R.; Midgley, Adrian W.; Abt, Grant; Taylor, Lee


Jeffrey W. F. Aldous

Ibrahim Akubat

Bryna C. R. Chrismas

Samuel L. Watkins

Alexis R. Mauger

Adrian W. Midgley

Lee Taylor


The current study investigated the reliability and validity of a novel non-motorised treadmill(NMT) based soccer simulation utilising a novel activity category called a ‘variable run’to quantify fatigue during high-speed running. Twelve male University soccer players completed three familiarisation sessions and one peak speed assessment before completing the Intermittent Soccer Performance Test (iSPT) twice. The two iSPT’s were separated by 6 –10 days. The total distance, sprint distance and high-speed running distance were 8968 ± 430m, 980 ± 75 m and 2122 ± 140 m, respectively. No significant difference (p>0.05) was found between repeated trials of the iSPT for all physiological and performance variables. Reliability measures between iSPT1 and iSPT2 showed good agreement (CV: <4.6%; ICC: >0.80). Furthermore, the variable run phase showed high-speed running distance significantly decreased (p<0.05) in the last 15 min (89 ± 6 m) compared to the first 15 min (85 ± 7 m), quantifying decrements in high-speed exercise compared to previous literature. The current study validates the iSPT as a NMT based soccer simulation compared to previous match-play data, and is a reliable tool for assessing and monitoring physiological and performance variables in soccer players. The iSPT could be utilised in a number of ways including player rehabilitation, understanding the efficacy of nutritional interventions, and also the quantification of environmentally mediated decrements upon soccer-specific performance.


Aldous, J. W. F., Akubat, I., Chrismas, B. C. R., Watkins, S. L., Mauger, A. R., Midgley, A. W., …Taylor, L. (2014). The reliability and validity of a soccer-specific non-motorised treadmill simulation (iSPT). Journal of strength and conditioning research, 28(7), 1971-1980.

Publication Date 2014-07
Deposit Date Oct 12, 2015
Publicly Available Date Nov 23, 2017
Journal Journal of strength and conditioning research
Print ISSN 1064-8011
Electronic ISSN 1533-4287
Publisher Lippincott, Williams & Wilkins
Peer Reviewed Peer Reviewed
Volume 28
Issue 7
Pages 1971-1980
Keywords Intermittent; Soccer protocol; Variable run
Public URL
Additional Information Author's accepted manuscript of article published in: Journal of strength and conditioning research, 2014, v.28, issue 7


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