Are three contact efforts really reflective of a repeated high-intensity effort bout?

Johnston, Rich D. and Gabbett, Tim J. and Walker, Shane and Walker, Ben and Jenkins, David G. (2015) Are three contact efforts really reflective of a repeated high-intensity effort bout? Journal of Strength and Conditioning Research, 29 (3). pp. 816-821. ISSN 1064-8011

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Abstract

The use of 3 or more efforts (running and contact), separated by short recovery periods, is widely used to define a 'repeated high-intensity effort' (RHIE) bout in rugby league. It has been suggested that due to fatigue, players become less effective after RHIE bouts; however, there is little evidence to support this. This study determined whether physical performance is reduced after performing 1, 2, or 3 efforts with minimal recovery. Twelve semiprofessional rugby league players (age: 24.5 ± 2.9 years) competed in 3 'off-side' small-sided games (2 × 10-minute halves) with a contact bout performed every 2 minutes. The rules of each game were identical except for the number of contact efforts performed in each bout. Players performed 1, 2, or 3 × 5-second wrestling bouts in the single-, double- and triple-contact game, respectively. Movement demands of each game were monitored using global positioning system units. From the first to the second half, there were trivial reductions in relative distance during the single-contact game (ES -0.13 ± 0.12), small reductions during the double-contact game (ES -0.47 ± 0.24), and moderate reductions during the triple-contact game (ES -0.74 ± 0.27). These data show that running intensity is progressively reduced as the number of contact efforts per bout is increased. Targeting defensive players and forcing them to perform 2 or more consecutive contact efforts is likely to lead to greater reductions in running intensity. Conditioning performing multiple contact efforts while maintaining running intensity should therefore be incorporated into training for contact team sports.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Access to Accepted version in accordance with the copyright policy of the publisher.
Faculty / Department / School: No Faculty
Date Deposited: 25 May 2017 01:45
Last Modified: 14 Sep 2017 01:17
Uncontrolled Keywords: contact sport; pacing; physical demands; tackles; adult; athletic performance; cross-over studies; football; humans; male; physical conditioning, human; physical endurance; random allocation; recovery of function; running; wrestling; young adult
Fields of Research : 11 Medical and Health Sciences > 1106 Human Movement and Sports Science > 110699 Human Movement and Sports Science not elsewhere classified
Socio-Economic Objective: C Society > 92 Health > 9299 Other Health > 929999 Health not elsewhere classified
Identification Number or DOI: 10.1519/JSC.0000000000000679
URI: http://eprints.usq.edu.au/id/eprint/32300

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