Identifying high risk loading conditions for in-season injury in elite Australian football players
(Identifizierung von Belastungssituationen mit hohem Verletzungsrisiko innerhalb der Saison bei australischen Elite-Footballspielern)
Objectives: To examine different timeframes for calculating acute to chronic workload ratio (ACWR) and whether this variable is associated with intrinsic injury risk in elite Australian football players.
Design: Prospective cohort study.
Methods: Internal (session rating of perceived exertion: sRPE) and external (GPS distance and sprint distance) workload and injury data were collected from 70 players from one AFL club over 4 seasons. Various acute (1-2 weeks) and chronic (3-8 weeks) timeframes were used to calculate ACWRs: these and chronic load categories were then analysed to determine the injury risk in the subsequent month. Poisson regression with robust errors within a generalised estimating equation were utilised to determine incidence rate ratios (IRR).
Results: Altering acute and/or chronic timeframes did not improve the ability to detect high injury risk conditions above the commonly used 1:4 week ACWR. Twenty-seven ACWR/chronic load combinations were found to be "high risk conditions" (IRR > 1, p < 0.05) for injury within 7 days. Most (93%) of these conditions occurred when chronic load was low or very low and ACWR was either low (<0.6) or high (>1.5). Once a high injury risk condition was entered, the elevated risk persisted for up to 28 days.
Conclusions: Injury risk was greatest when chronic load was low and ACWR was either low or high. This heightened risk remained for up to 4 weeks. There was no improvement in the ability to identify high injury risk situations by altering acute or chronic time periods from 1:4 weeks.
© Copyright 2018 Journal of Science and Medicine in Sport. Elsevier. Alle Rechte vorbehalten.
Schlagworte: | Training Belastung Australien Verletzung Fußball Untersuchungsmethode GPS |
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Notationen: | Biowissenschaften und Sportmedizin Spielsportarten |
Tagging: | Australian Football |
DOI: | 10.1016/j.jsams.2017.05.012 |
Veröffentlicht in: | Journal of Science and Medicine in Sport |
Veröffentlicht: |
2018
|
Jahrgang: | 21 |
Heft: | 1 |
Seiten: | 46-51 |
Dokumentenarten: | Artikel |
Sprache: | Englisch |
Level: | hoch |