The use of individualized speed and intensity thresholds for determining the distance run at high-intensity in professional soccer
Deutscher übersetzter Titel: | Der Nutzen von individuellen Geschwindigkeits- und Intensitätsschwellen zur Bestimmung der Distanz im Laufen auf hoher Intensität im professionellen Fußball |
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Autor: | Abt, Grant; Lovell, Ric |
Erschienen in: | Journal of sports sciences |
Veröffentlicht: | 27 (2009), 9, S. 893-898, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Elektronische Ressource (online) Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 0264-0414, 1466-447X |
DOI: | 10.1080/02640410902998239 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201409008576 |
Quelle: | BISp |
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 (VT2speed) for assessment of the distance run at high-intensity during matches. Ten professional soccer players completed a maximal treadmill test to determine VT2speed. 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 VT2speed. Differences between VT2speed 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 VT2speed 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 VT2speed 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. Verf.-Referat