@article{ref1,
title="Training loads and injury risk in Australian football-differing acute: chronic workload ratios influence match injury risk",
journal="British journal of sports medicine",
year="2016",
author="Carey, David L. and Blanch, Peter and Ong, Kok-Leong and Crossley, Kay M. and Crow, Justin and Morris, Meg E.",
volume="51",
number="16",
pages="1215-1220",
abstract="AIMS: (1) To investigate whether a daily acute:chronic workload ratio informs injury risk in Australian football players; (2) to identify which combination of workload variable, acute and chronic time window best explains injury likelihood. <br><br>METHODS: Workload and injury data were collected from 53 athletes over 2 seasons in a professional Australian football club. Acute:chronic workload ratios were calculated daily for each athlete, and modelled against non-contact injury likelihood using a quadratic relationship. 6 workload variables, 8 acute time windows (2-9 days) and 7 chronic time windows (14-35 days) were considered (336 combinations). Each parameter combination was compared for injury likelihood fit (using R(2)). <br><br>RESULTS: The ratio of moderate speed running workload (18-24 km/h) in the previous 3 days (acute time window) compared with the previous 21 days (chronic time window) best explained the injury likelihood in matches (R(2)=0.79) and in the immediate 2 or 5 days following matches (R(2)=0.76-0.82). The 3:21 acute:chronic workload ratio discriminated between high-risk and low-risk athletes (relative risk=1.98-2.43). Using the previous 6 days to calculate the acute workload time window yielded similar results. The choice of acute time window significantly influenced model performance and appeared to reflect the competition and training schedule. <br><br>CONCLUSIONS: Daily workload ratios can inform injury risk in Australian football. Clinicians and conditioning coaches should consider the sport-specific schedule of competition and training when choosing acute and chronic time windows. For Australian football, the ratio of moderate speed running in a 3-day or 6-day acute time window and a 21-day chronic time window best explained injury risk.<br><br>Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/.<p /> <p>Language: en</p>",
language="en",
issn="0306-3674",
doi="10.1136/bjsports-2016-096309",
url="http://dx.doi.org/10.1136/bjsports-2016-096309"
}