Longitudinal development of anthropometric and physical characteristics within academy rugby league players
Deutscher übersetzter Titel: | Längsschnittentwicklung der anthropometrischen und physischen Merkmale bei Academy-Rugby-League-Spielern |
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Autor: | Till, Kevin; Jones, Ben; Darrall-Jones, Joshua D.; Emmonds, Stacey; Cooke, Carlton |
Erschienen in: | Journal of strength and conditioning research |
Veröffentlicht: | 29 (2015), 6, S. 1713-1722, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Elektronische Ressource (online) Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 1064-8011, 1533-4287 |
DOI: | 10.1519/JSC.0000000000000792 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201509007297 |
Quelle: | BISp |
Abstract des Autors
The purpose of this study was to evaluate the annual and long-term (i.e., 4 years) development of anthropometric and physical characteristics in academy (16–20 years) rugby league players. Players were assessed at the start of preseason over a 6-year period and were required to be assessed on consecutive years to be included in the study (Under 16–17, n = 35; Under 17–18, n = 44; Under 18–19, n = 35; Under 19–20, n = 16). A subset of 15 players were assessed for long-term changes over 4 years (Under 16–19). Anthropometric (height, body mass, sum of 4 skinfolds) and physical (10- and 20-m sprint, 10-m momentum, vertical jump, yo-yo intermittent recovery test level 1, 1 repetition maximum [1RM] squat, bench press, and prone row) assessments were collected. Paired t-tests and repeated measures analysis of variance demonstrated significant annual (e.g., body mass, U16 = 76.4 ± 8.4, U17 = 81.3 ± 8.3 kg; p < 0.001, d = 0.59) and long-term (e.g., vertical jump, Under 16 = 44.1 ± 3.8, Under 19 = 52.1 ± 5.3 cm; p < 0.001, d = 1.74) changes in anthropometric and physical characteristics. Greater percentage changes were identified between the Under 16–17 age categories compared with the other ages (e.g., 1RM squat, U16–17 = 22.5 ± 19.5 vs. U18–19 = 4.8 ± 6.4%). Findings demonstrate the annual and long-term development of anthropometric and physical characteristics in academy rugby league players establishing greater changes occur at younger ages upon the commencement of a structured training program within an academy. Coaches should understand the long-term development of physical characteristics and use longitudinal methods for monitoring and evaluating player performance and development. Verf.-Referat