RT Journal Article SR Electronic T1 264 Return to play from previous injury within 1 years may be an important risk factors to be considered in order to prevent recurrent injury during major events for young athletes JF British Journal of Sports Medicine JO Br J Sports Med FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine SP A102 OP A103 DO 10.1136/bjsports-2021-IOC.243 VO 55 IS Suppl 1 A1 Youngjun Kim A1 Sejun Kim A1 Hee Seong Jeong A1 Sae Yong Lee YR 2021 UL http://bjsm.bmj.com/content/55/Suppl_1/A102.3.abstract AB Background Investigating the relationship between time from return to play (RTP) and injury characteristics may provide an important information to preventing a recurrent injury in mass sports event.Objective To investigate rate of recurrent injuries, and injury types and parts of recurrent injuries during 2017 Summer and Winter Universiade Games.Design Prospective epidemiological study.Setting Injuries were reported during 2017 Summer (2017S) and Winter Universiade (2017W) Games by medical staffs.Main Outcome Measurements Using typical IOC injury report data and data extracted from Team Korea EMR(electronic medical records) system tracking injuries of all national team, epidemiological datum were analyzed. These include injury body parts, types, RTP within 1 year and RTP over 1 year.Results A total of 80 [(47 recurrent (59%)] and 39 [17 recurrent (44%)] injuries were identified during 2017S and 2017W repectively. Top two injured parts in 2017S were lumbar (n=9, 11%) and ankle (n=8, 10%) in within 1 year from RTP whereas shoulder (n=5, 6%) and lumbar (n=4, 5%) in over 1years from RTP. Top two injured types in 2017S were strain (n=11, 14%) and tendonitis (n=9, 11%) in within 1 year from RTP whereas strain (n=6, 8%) and nerve injury (n=3, 4%) in over 1years of RTP. Top two injured parts in 2017W were knee (n=5, 16%) and lumbar (n=3, 9%) in within 1 year from RTP whereas lumbar (n=4, 13%) and hip (n=1, 3%) in over 1years of RTP. Top two injured types in 2017W were sprain (n=7, 22%), meniscus (n=2, 6%) in within 1 year RTP whereas sprain (n=5, 16%) and nerve injury (n=1, 3%) in over 1years from RTP.Conclusions Athletes who RTP within a year should be cautious to be re-injured during major sports events. Major body parts to be considered are lumbar, knee, and ankle with muscle and ligament injuries.