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Can the Use of an External: Internal Ratio During Standardised Small-Sided Games be a Detector of Fatigue in Professional Adolescent Soccer Players?

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posted on 17.05.2022, 16:32 authored by Connor Derbidge, Jeremy Moody, Paul Byrne

 The aim of the investigation was to explore whether the external: internal(E: I) ratio during a standardised small-sided game (SSG) was impacted by fatigue monitoring methods in professional adolescent soccer players. Ten professional male soccer players (Mean ± SD; Age: 19.6 ± 1.4 years) data from seven standardised SSG’s (6v6+GK, 2x4 min, 40 x 35m) were analysed during the study. Total distance (TD):Heart rate exertion (HRe), PlayerLoadTM(PL): HReand Explosive distance (ED): HRewere the E: Iratio’s analysed from the SSG’s. Morning perceived wellness score, using a customised self-report questionnaire (energy levels, sleep and muscle soreness), and Flight time: Contraction time (FT:CT), taken from a counter-movement jump (CMJ) performed prior totraining, were used as markers of fatigue in the study. A Z-score of -1 was considered ‘fatigued’. Mixed-effect linear models revealed a significant effect for perceived wellness Z-score on TD: HRe, PL: HReand ED: HRe, which resulted in a small increase in allE: Iratios. FT: CTZ-score resulted in a non-significant, trivial effect on TD: HRe, PL: HReand ED: HRe. The results suggest E:I ratiosare influenced by subjective fatigue, thus, E: Iratio’s may be a non-invasive tool for fatigue detection. However, caution should be taken when interpreting an increase in E:I ratio, and, therefore, the use of E: Iratio’s as a means for fatigue detection requires further investigation. 

History

Published in

ARC Journal of Research in Sports Medicine

Publisher

Arc Publications

Publication Year

2020

Version

VoR (Version of Record)

Citation

Derbidge, C., Moody, J. & Byrne, P. (2020) 'Can the Use of an External: Internal Ratio During Standardised Small-Sided Games be a Detector of Fatigue in Professional Adolescent Soccer Players?', ARC Journal of Research in Sports Medicine.4(2) pp 40-47

Cardiff Met Affiliation

  • Cardiff School of Sport and Health Sciences

Cardiff Met Authors

Jeremy Moody

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© The Authors

Language

en

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