- Title
- Do physical capacity and interchange rest periods influence match exercise-intensity profile in Australian football?
- Creator
- Mooney, Mitchell; Cormack, Stuart; O'Brien, Brendan; Coutts, Aaron
- Date
- 2013
- Type
- Text; Journal article
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/57543
- Identifier
- vital:4938
- Identifier
- http://www.scopus.com/inward/record.url?eid=2-s2.0-84875538940&partnerID=40&md5=c1e59d5796d5ce2eda7434f9afe2e0d9
- Identifier
- ISSN:1555-0265
- Abstract
- Purpose: The purpose of this study was to determine if Yo-Yo Intermittent Recovery level 2 (Yo-Yo IR2) and the number of interchange rotations affected the match activity profile of elite Australian footballers. Method: Fifteen elite Australian footballers completed the Yo-Yo IR2 before the beginning of the season and played across 22 matches in which match activity profiles were measured via microtechnology devices containing a global positioning system (GPS) and accelerometer. An interchange rotation was counted when a player left the field and was replaced with another player. Yo-Yo IR2 results were further split into high and low groups. Results: Players match speed decreased from 1st to 4th quarter, while average-speed (m/min: P = .05) and low-speed activity (LSA, <15 km/h) per minute (LSA m/min; P = .06) significantly decreased in the 2nd half. Yo-Yo IR2 influenced the amount of m/min, high-speed running (HSR, >15 km/h) per minute (HSR m/min) and accelerometer load/min throughout the entire match. The number of interchanges significantly influenced the HSR m/min and m/min throughout the match except in the 2nd quarter. Furthermore, the low Yo-Yo IR2 group had significantly less LSA m/min in the 4th quarter than the high Yo-Yo IR2 group (92.2 vs 96.7 m/ min, P = .06). Conclusions: Both the Yo-Yo IR2 and number of interchanges contribute to m/min and HSR m/min produced by elite Australian footballers, affecting their match activity. However, while it appears that improved Yo-Yo IR2 performance prevents reductions in LSA m/min during a match, higher-speed activities (HSR m/min) and overall physical activity (m/min and load/min) are still reduced in the 4th quarter compared with the 1st quarter. © 2013 Human Kinetics, Inc.
- Relation
- International Journal of Sports Physiology and Performance Vol. 8, no. 2 (2013), p. 165-172
- Rights
- Human Kinetics, Inc
- Rights
- Open Access
- Rights
- This metadata is freely available under a CCO license
- Subject
- High-speed running; Substitution; Yo-Yo Intermittent Recovery Test; 1106 Human Movement and Sports Science
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