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The use of individualized speed and intensity thresholds for determining the distance run at high-intensity in professional soccer

Lovell, Ric; Abt, Grant

Authors

Ric Lovell

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Dr Grant Abt G.Abt@hull.ac.uk
Reader (Associate Professor) of Sport and Exercise Physiology, Department for Sport, Health and Exercise Science



Abstract

As with other match analysis systems, ProZone® uses an absolute speed threshold to identify running speeds at "high-intensity". In this study, we examined the use of an individualized high-intensity speed threshold based on the speed at the second ventilatory threshold (VT 2speed ) for assessment of the distance run at high-intensity during matches. Ten professional soccer players completed a maximal treadmill test to determine VT 2speed . Match data were identified by means of the ProZone® match analysis system. The distances run at high-intensity during matches were calculated using the default value (19.8 km·h -1 ) and VT 2speed . Differences between VT 2speed and the default were analysed using a non-parametric median sign test. The distances run at high-intensity were compared with a paired t-test. The median VT 2speed was 15 km·h -1 (range 14-16 km·h -1 ), which was less than the default (P < 0.01). Mean distance run at high-intensity based on the default and VT 2speed was 845 m (s = 296) and 2258 m (s = 707), respectively [mean difference 1413 m; P < 0.001 (95% CI: 1037-1789 m)]. The high-intensity running speeds based on the second ventilatory threshold are substantially less than that used as the default within the ProZone® match analysis system, thus the distance run at high-intensity can be substantially underestimated.

Citation

Lovell, R., & Abt, G. (2009). The use of individualized speed and intensity thresholds for determining the distance run at high-intensity in professional soccer. Journal of sports sciences, 27(9), (893-898). doi:10.1080/02640410902998239. ISSN 0264-0414

Journal Article Type Article
Acceptance Date Apr 27, 2009
Online Publication Date Jul 23, 2009
Publication Date Sep 14, 2009
Publicly Available Date
Journal JOURNAL OF SPORTS SCIENCES
Print ISSN 0264-0414
Electronic ISSN 1466-447X
Publisher Taylor & Francis
Peer Reviewed Peer Reviewed
Volume 27
Issue 9
Article Number PII 913335466
Pages 893-898
DOI https://doi.org/10.1080/02640410902998239
Keywords ProZone; Soccer; Exercise intensity
Public URL https://hull-repository.worktribe.com/output/396000
Publisher URL https://www.tandfonline.com/doi/abs/10.1080/02640410902998239