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• W4309336400 abstract "INTRODUCTION: Quadriceps muscle strain injuries are prevalent in the Australian Football League (AFL) with each team recording 1-2 new quadriceps strain injuries per season. Little is known about the epidemiology and recovery time frames for quadriceps muscle strain injuries especially when compared to other common muscle injuries in football. This study aimed to describe the epidemiology of quadriceps muscle strain injuries in AFL players. We also aimed to describe recovery milestones and to investigate the influence of clinical factors such as injury type (index or re injury), the primary muscle injured, and the mechanism of injury on recovery timeframes. METHODS: Quadriceps muscle strain injury data from the Soft Tissue Injury Registry of the Australian Football League from the 2014-2020 seasons were evaluated. Player demographic data, circumstances of injury (activity and mechanism of injury), MRI results (location of injury) and recovery outcomes following injury (days to walk pain free, return to running >90% of maximum speed, return to full training, return to play) were extracted. Descriptive statistics and frequency distributions were used to describe the epidemiology of quadriceps injuries. Mann Whitney U tests were used to assess between group differences in recovery milestones for injury type, injury location and mechanism of injury. RESULTS: 164 quadriceps injuries from 122 players were included. There was an average of 23.4 injuries per season (range: 31-16) with a mean return to play time of 25.4 days (95% CI 22.6-28.2). There were 134 index injuries and 30 re-injuries (18.3%). Of the 137 injuries with MRI investigation, the majority of strains occurred in the rectus femoris (91.3%). Nearly half (48.4%) of all injuries occurred during kicking, with a further 14.8% occurring during acceleration activities. Quadriceps injuries were most prevalent in the dominant kicking leg (72.0%), and more frequent during training (64.6%). All re-injuries (100%) occurred in the rectus femoris. 70.0% of re-injuries occurred within 6 months of the prior injury, primarily from kicking (63.0%). Longer return to play timeframes were found for injuries occurring in the rectus femoris (rectus femoris 28.8 days, SD 15.1 vs vastii 14.9 days, SD 11.1; p=0.001), and for injuries with a kicking mechanism (kicking 28.0 days, SD 15.7 vs other mechanism 22.3 days, SD 13.1; p=0.045). Re-injuries occurred in older players (re injuries 25.4 years, SD 3.9 vs index injuries 23.9 years, SD 4.1; p=0.047) and took longer to return to play (re-injuries 30.2 days, SD 13.9 vs index injuries 24.6 days, SD 14.9; p=0.074). DISCUSSION: Quadriceps muscle strain injuries in AFL players most frequently occur in the dominant leg, in training, from a kicking mechanism. Rectus femoris injuries are more prevalent and result in significantly longer return to play timeframes than vastii injuries. Re-injuries occured in the rectus femoris, primarily from kicking. IMPACT AND APPLICATION: Knowledge of the clinical factors that influence recovery outcomes and re-injury may be of assistance to clinicians when assessing quadriceps muscle strain injuries, when developing rehabilitation programs and determining return to play timeframes. Conflict of Interest Statement: My co-authors and I acknowledge that we have no conflict of interest of relevance to the submission of this abstract." @default.
• W4309336400 created "2022-11-26" @default.
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• W4309336400 date "2022-11-01" @default.
• W4309336400 modified "2023-10-04" @default.
• W4309336400 title "Epidemiology of quadriceps muscle strain injuries in elite Australian rules football players." @default.
• W4309336400 doi "https://doi.org/10.1016/j.jsams.2022.09.096" @default.
• W4309336400 hasPublicationYear "2022" @default.
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