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|Title:||Energetic and metabolic power demands of interchange and full-match players within National Rugby League match-play||Contributor(s):||Cummins, Cloe (author) ; Gray, Adrian (author) ; Shorter, Kathleen (author) ; Halaki, Mark (author); Orr, Rhonda (author)||Publication Date:||2015||Handle Link:||https://hdl.handle.net/1959.11/21067||Abstract:||Background: Mechanical time-motion models based upon running velocity have estimated the energetic demands of field-based team sports. Little, however, is known about how full-match and interchange players distribute their energetic demands throughout match-play. The purpose therefore is to describe and compare the metabolic demands of rugby league for interchange and full-match players. Methods: Eighteen elite rugby league players participated in this study. A time-motion model was used to estimate the energy expenditure and metabolic demands of rugby league match-play utilising Global Positioning System (GPS) technology. This approach uses a player's GPS velocity-time curve to estimate the positive/negative mechanical work done by the centre of mass in the horizontal/vertical planes, by the swinging-limbs and to overcome air-resistance. It's assumed the sum of these components is the total mechanical-work done due to locomotor demands. Players were categorized into positional groups: outside backs (OB), adjustables (ADJ), wide-running forwards (WRF) and hit-up forwards (HUF). Players were further categorized into full-match or interchange players. Match-play demands were enumerated by match time (min), relative distance (m.min⁻¹), acceleration/deceleration counts in moderate, high and very high zones (n.min⁻¹), energy expenditure (kJ.kg⁻¹), mean power (W.kg⁻¹), anaerobic index (arbitrary-unit) and equivalent distance (m).||Publication Type:||Conference Publication||Conference Name:||2015 ASICS Sports Medicine Australia Conference, Gold Coast, Australia, 21st - 24th October, 2015||Conference Details:||2015 ASICS Sports Medicine Australia Conference, Gold Coast, Australia, 21st - 24th October, 2015||Source of Publication:||2015 ASICS Sports Medicine Australia Conference Book of Abstracts, p. 22-22||Publisher:||Sports Medicine Australia||Place of Publication:||Australia||ISSN:||1440-2440||Field of Research (FOR):||110699 Human Movement and Sports Science not elsewhere classified||Socio-Economic Outcome Codes:||950102 Organised Sports||HERDC Category Description:||E3 Extract of Scholarly Conference Publication||Other Links:||http://sma.org.au/wp-content/uploads/2015/10/BOA-Final-lr.pdf||Series Name:||Journal of Science and Medicine in Sport||Series Number :||December 2015 Supplement||Statistics to Oct 2018:||Visitors: 41
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