@article{ref1,
title="Injury risk-workload associations in NCAA American college football",
journal="Journal of science and medicine in sport",
year="2018",
author="Sampson, J. A. and Murray, A. and Williams, S. and Halseth, Travis J. and Hanisch, J. and Golden, G. and Fullagar, H. H. K.",
volume="21",
number="12",
pages="1215-1220",
abstract="OBJECTIVES: To determine injury risk-workload associations in collegiate American Football. <br><br>DESIGN: Retrospective analysis. <br><br>METHODS: Workload and injury data was recorded from 52 players during a full NCAA football season. Acute, chronic, and a range of acute:chronic workload ratios (ACWR: 7:14, 7:21 and 7:28 day) calculated using rolling and exponentially weighted moving averages (EWMA) were plotted against non-contact injuries (regardless of time lost or not) sustained within 3- and 7-days. Injury risks were also determined relative to position and experience. <br><br>RESULTS: 105 non-contact injuries (18 game- and 87 training-related) were observed with almost 40% sustained during the pre-season. 7-21 day EWMA ACWR's with a 3-day injury lag were most closely associated with injury (R<sup>2</sup>=0.54). Relative injury risks were >3× greater with high compared to moderate and low ratios and magnified when combined with low 21-day chronic workloads (injury probability=92.1%). Injury risks were similar across positions. 'Juniors' presented likely and possibly increased overall injury risk compared to 'Freshman' (RR: 1.94, CI 1.07-3.52) and 'Seniors' (RR: 1.7, CI 0.92-3.14), yet no specific ACWR - experience or - position interactions were identified. <br><br>CONCLUSIONS: High injury rates during college football pre-season training may be associated with high acute loads. In-season injury risks were greatest with high ACWR and evident even when including (more common and less serious) non-time loss injuries. Substantially increased injury risks when low 21-day chronic workloads and concurrently high EWMA ACWR highlights the importance of load management for individuals with chronic game- (non-involved on game day) and or training (following injury) absences.<br><br>Copyright © 2018 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.<p /> <p>Language: en</p>",
language="en",
issn="1440-2440",
doi="10.1016/j.jsams.2018.05.019",
url="http://dx.doi.org/10.1016/j.jsams.2018.05.019"
}