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Sensitivity and reproducibility of a fatigue response in elite youth football players

Research output: Contribution to journalArticle

  • John Fitzpatrick
  • Richard Akenhead
  • Mark Russell
  • Kirsty Hicks
  • Philip Hayes
Original languageEnglish
JournalScience and Medicine in Football
StateAccepted/In press - 7 Jan 2019
This study aimed to establish firstly, the sensitivity of subjective wellness, jump performance and tri-axial accelerometer measures to training-induced fatigue and secondly, the reproducibility of this training-induced fatigue response. In 14 elite youth football players, morning assessments of subjective wellness (fatigue, sleep quality, muscle soreness, stress and mood), jump performance (countermovement jump height [CMJ], squat jump height [SJ] and drop jump contact time [DJ-CT], height [DJ-JH] and reactive strength index [DJ-RSI]) and tri-axial accelerometer data (PlayerLoadTM (PL), the individual movement planes of PL (anterior–posterior [PLAP], mediolateral [PLML] and vertical [PLV]) and the percentage contribution of each component plane) were collected before (-24 h and immediately prior) and after (+24 h, +48 h) a standardised strenuous training session on two occasions in order to assess the reproducibility of a training-induced fatigue response. Sensitivity was assessed via the signal: noise (S:N) ratio of the changes in fatigue measures +24 h post training and the minimum detectable change for each measure. DJ-RSI, PLML and %PLV were found to be sensitive measures of training-induced fatigue, which displayed a reproducible response (S:N >1 on both occasions). CMJ, SJ and all subjective wellness measures were not able to detect a reproducible fatigue response.

    Research areas

  • Fatigue, monitoring, accelerometer, soccer

Related faculties, schools or groups

External organisations

  • Newcastle United Football Club
  • The Football Association
  • Health and Life Sciences, Northumbria University, Newcastle-upon-Tyne, UK

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