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Reliability of ‘in-season’ fitness assessments in youth elite soccer players: a working model for practitioners and coaches.

Enright, KJ and Morton, JP and Iga, J and Lothian, D and Roberts, SJ and Drust, B (2017) Reliability of ‘in-season’ fitness assessments in youth elite soccer players: a working model for practitioners and coaches. Science and Medicine in Football. ISSN 2473-3938

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Abstract

Purpose: To assess the reliability of a battery of field tests when performed around habitual training during one micro-cycle of the ‘in-season’ period in youth elite soccer players. Methods: n=19 English Premier League academy players (mean ± SD: age, 18.3±0.2 years; stature, 1.80±0.05 m; body mass, 76.5±7.5 kg; V̇O2 max; 62.3±4.38 ml·kg-1·min-1 Sum of 8 skinfolds; 64.8±17.4 mm) performed; ‘1RM half-back squat (HBS)’, ‘vertical jump’ (VJ), ‘Yo-Yo IR2’, ’5, 10 & 20 m, sprint’, ‘the agility T-test’ and a ‘repeated sprint ability’ assessments around their habitual ‘in-season’ training and match-play on two occasions. Typical error (TE), coefficient of variation (CV), the smallest worthwhile change (SWC) was then calculated between trials. Test usefulness was then calculated by comparing the ‘SWC’ to the TE and rated as; good, OK or marginal. The smallest difference needed to be considered real (MD), was also calculated using the equation (TE×1.96×√2). Results: Most assessments demonstrated relatively high levels of reproducibility (CV; 0.3 - 4.3 %) to witness an “almost certain beneficial change” (i.e.,>MD) changes of approximately 5% (RSAbest, RSAmean, 10m & 20m sprint, ‘agility T test’ and 1RM HBS), and 11.5% (VJ, 5m sprint, and Yo-Yo IR2) are needed. Conclusions: The present training and testing ‘model’ is reliable and could be used when evaluating the fitness of highly trained youth elite soccer players during the ‘in-season’ period.

Item Type: Article
Additional Information: This is an Accepted Manuscript of an article published by Taylor & Francis in Science and Medicine in Football on 07/12/17, available online: http://www.tandfonline.com/10.1080/24733938.2017.1411603
Subjects: G Geography. Anthropology. Recreation > GV Recreation Leisure
R Medicine > RC Internal medicine > RC1200 Sports Medicine
G Geography. Anthropology. Recreation > GV Recreation Leisure > GV561 Sports
Divisions: School of Sport Studies, Leisure and Nutrition
Sport & Exercise Sciences
Publisher: Taylor and Francis
Date Deposited: 10 Jul 2017 11:26
Last Modified: 07 Dec 2017 12:41
DOI or Identification number: 10.1080/24733938.2017.1411603
URI: http://researchonline.ljmu.ac.uk/id/eprint/6717

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