@article{ref1,
title="Determining the relationship between internal load markers and non-contact injuries in young elite soccer players",
journal="International journal of sports physiology and performance",
year="2019",
author="Raya-González, Javier and Nakamura, Fabio Yuzo and Castillo, Daniel and Yanci, Javier and Fanchini, Maurizio",
volume="14",
number="4",
pages="421-425",
abstract="PURPOSE: To examine the association and predictive ability of internal load markers with regards to non-contact injuries in young elite soccer players. <br><br>METHODS: Twenty-two soccer players (18.6 ±.6 years) who competed in the Spanish U19 League participated in the study. During a full season, non-contact injuries were recorded and, using session rating of perceived exertion (s-RPE), internal weekly load (sum of load of all training sessions and matches for each week) and acute:chronic workload ratio (typically, acute = current week and chronic = rolling 4 week average) were calculated. A Generalized Estimating Equation analysis was used to examine association of weekly and acute:chronic load ratio markers with a non-contact injury in the subsequent week. Load variables were also analyzed for predictive ability with Receiver Operating Characteristic (ROC) curve and area under the curve (AUC). <br><br>RESULTS: No association was found for weekly load (CI 1.00,.99 to 1.00) and acute:chronic load ratio (CI.16,.01 to 1.84) with respect to injury occurrence. In addition, the analyzed load markers showed poor ability to predict injury occurrence (AUC<.50). <br><br>CONCLUSIONS: The results of this study suggest that internal load markers are not associated with non-contact injuries in young soccer players and present poor predictive capacity with regards to the latter.<p /> <p>Language: en</p>",
language="en",
issn="1555-0265",
doi="10.1123/ijspp.2018-0466",
url="http://dx.doi.org/10.1123/ijspp.2018-0466"
}