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POSTER ABSTRACTS - THURSDAY, 21 MAY 2015P04.03Risk assessment of shoulder injuries using preseason muscle strength test in collegiate RugbyUnion playersRyo Ogaki(1), M Takemura(2), S Nagai(3), Y Imoo(4), S Takaki(2), K Shirahata(1), S Miyakawa(2)(1) Sendai University, Faculty of Sports Science, Shibata, Japan(2) University of Tsukuba, Japan(3) Tsukuba International University, Japan(4) Mito Kyodo General Hospital, JapanThe purpose of this study was to examine cut-off value of muscle strength test for risk assessmentof shoulder injuries in collegiate rugby union players. This prospective cohort study initiallyregistered 28 rugby union players from one university club. Players with a history of shouldersurgery or histories of shoulder injuries were excluded from the study. All players participated inthe preseason muscle strength test of shoulder joints, including 1RM bench press, 1RM shoulderpress, internal rotational isometric muscle strength [IR], external rotational isometric musclestrength [ER], and abductor isometric muscle strength [ABD]. The occurrence of shoulder injurieswas recorded during the 2011-2012 playing seasons. Shoulder dislocation/instability or rotator cuffinjuries were included as injuries. This study was designed to consider only time-loss injury. Thecut-off value to muscle strength test was determined by receiver operating characteristic (ROC)curve analysis. Seven players sustained shoulder injuries during the seasons. All muscle strengthtests were significantly lower in injured players (n=7) compared with no injured players (n=21)(p