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This study aims to quantify and compare the positional game demands of international junior and senior rugby league competition for the first time. Global Positioning System (GPS) and video analysis were used to track 118 elite male rugby league players (57 seniors aged 28.7 ± 4.4 y; 61 juniors aged 17.2 ± .5 y) over 10 international matches (6 senior; 4 junior) characterized as either forwards (n = 67) or backs (n = 51). There were significant increases in the offensive carries (0.18 cf. 0.09 n.min; r = .56) and defensive tackles (0.36 cf. 0.23 n.min; r = .3) between senior and junior players, as well as forwards and backs (0.16 cf. 0.09; r = .34 and 0.41 cf. 0.14; r = .52) respectively. Running demands were significantly greater in backs than forwards (independent of playing level) for total distance (6962 ± 1263 m cf. 4879 ± 1824 m; r = .55), individualized high speed distances (310 ± 158 m cf. 250 ± 171 m; r = .2), high-intensity accelerations (28.7 ± 12.1 m·s cf. 21.9 ± 11.7 m·s; r = .27) and decelerations (57.2 ± 18.3 m·s cf. 43.0 ± 17.8 m·s; r = .38). Positional differences were eliminated when reported relative to minutes played. From a practical perspective, whilst running demands relative to time on the pitch may prepare junior players for senior competition, it is not representative of the increased body mass and contact frequency within the senior game. Coaches should therefore reflect these differences within their physical preparation programmes to prepare junior athletes accordingly for progression to the senior level.
This article was published in the following journal.
Name: Journal of strength and conditioning research
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System established by the World Health Organization and the International Committee on Thrombosis and Hemostasis for monitoring and reporting blood coagulation tests. Under this system, results are standardized using the International Sensitivity Index for the particular test reagent/instrument combination used.
Theoretical construct used in applied mathematics to analyze certain situations in which there is an interplay between parties that may have similar, opposed, or mixed interests. In a typical game, decision-making "players," who each have their own goals, try to gain advantage over the other parties by anticipating each other's decisions; the game is finally resolved as a consequence of the players' decisions.
An international organization whose members include most of the sovereign nations of the world with headquarters in New York City. The primary objectives of the organization are to maintain peace and security and to achieve international cooperation in solving international economic, social, cultural, or humanitarian problems.
International organizations which provide health-related or other cooperative services.
An international professional organization composed of one association per country for the purpose of improving and developing nursing's contribution to the promotion of health and care of the sick.