TY  - JOUR
PY  - 2018//
TI  - Identifying high risk loading conditions for in-season injury in elite Australian football players
JO  - Journal of science and medicine in sport
A1  - Stares, Jordan
A1  - Dawson, Brian
A1  - Peeling, Peter
A1  - Heasman, Jarryd
A1  - Rogalski, Brent
A1  - Drew, Michael
A1  - Colby, Marcus
A1  - Dupont, Gregory
A1  - Lester, Leanne
SP  - 46
EP  - 51
VL  - 21
IS  - 1
N2  - 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. <br><br>DESIGN: Prospective cohort study. <br><br>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). <br><br>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. <br><br>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.<br><br>Copyright © 2017 Sports Medicine Australia.     Keywords: Australian rules football    Published by Elsevier Ltd. All rights reserved.<p />  <p>Language: en</p>
LA  - en
SN  - 1440-2440
UR  - http://dx.doi.org/10.1016/j.jsams.2017.05.012
ID  - ref1
ER  -