The influence of training age on the annual development of physical qualities within academy rugby league players

Journal article


Till, Kevin, Darrall-Jones, Joshua, Weakley, Jonathon J., Roe, Gregory A. and Jones, Ben L.. (2017). The influence of training age on the annual development of physical qualities within academy rugby league players. Journal of Strength and Conditioning Research. 31(8), pp. 2110 - 2118. https://doi.org/10.1519/JSC.0000000000001546
AuthorsTill, Kevin, Darrall-Jones, Joshua, Weakley, Jonathon J., Roe, Gregory A. and Jones, Ben L.
Abstract

Abstract: Till, K, Darrall-Jones, J, Weakley, JJ, Roe, GA, and Jones, BL. The influence of training age on the annual development of physical qualities within academy rugby league players. J Strength Cond Res 31(8): 2110-2118, 2017-Previous research in academy rugby league players has evaluated the development of physical qualities according to chronological age. However, no study has considered the training age, defined as the number of formalized years of strength and conditioning training, of these players. Therefore, the purpose of this study was to present and compare the annual changes in physical qualities of academy rugby league players according to training age. Sixty-one academy players undertook a fitness testing assessment, including anthropometric (height, body mass, sum of 4 skinfolds) and physical (10 and 20 m sprint, 10m momentum, vertical jump, Yo-Yo intermittent recovery test level 1 [Yo-Yo IRTL1], one-repetition maximum [1RM] squat, bench press and prone row) measures at the start of preseason on 2 consecutive annual occasions. Players were categorized into one of 3 training age groups (i.e., 0, 1, or 2 years) and were analyzed using magnitude-based inferences. Almost certain, very likely or likely annual improvements were identified for body mass, 10m momentum, Yo-Yo IRTL1, vertical jump, and all strength measures for the 3 training age groups. When training age groups were compared, 1 year showed possibly or likely lower strength increases than 0 years training age. However, the 2 years training age group demonstrated possibly or likely increased strength changes compared with 1 year. These findings suggest that training age is an important consideration for strength and conditioning practitioners but it is likely to be a combination of chronological age, biological maturity, and training experience alongside dynamic interplayer variability that influences the physical development of academy rugby league players.

Keywordsanthropometry; strength; fitness; training experience; magnitude-based inferences
Year2017
JournalJournal of Strength and Conditioning Research
Journal citation31 (8), pp. 2110 - 2118
PublisherLippincott Williams & Wilkins
ISSN1064-8011
Digital Object Identifier (DOI)https://doi.org/10.1519/JSC.0000000000001546
Scopus EID2-s2.0-85041814838
Page range2110 - 2118
Research GroupSchool of Behavioural and Health Sciences
Publisher's version
File Access Level
Controlled
Place of publicationUnited States of America
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