Epidemiology of Hamstring Strain Injuries in Elite Male Australian Football Players: An Analysis of 773 Injuries Over 7 Seasons

OBJECTIVE: To describe the incidence, recurrence, and time loss until achievement of recovery milestones of hamstring strain injuries (HSIs) across 7 playing seasons using data from the Soft Tissue Injury Registry of the Australian Football League (STRAFL). STUDY DESIGN: Descriptive epidemiology study. METHODS: Eighteen AFL teams participated in the STRAFL in at least 1 season between 2014 and 2020 (average 15.7 teams per season). Details of each clinically diagnosed HSI were recorded on a standardized injury surveillance form by medical staff. RESULTS: 773 HSIs from 424 different players were reported, with each team averaging 7 HSIs per season. Of all in-season injuries, 72% occurred during competitive games. The biceps femoris was most commonly injured (84%) followed by the semimembranosus (11%). Recurrent HSIs accounted for 26% of all injuries, with 52% occurring within 2 months of the index injury. The majority (93%) of recurrent injuries were to the biceps femoris. Return to play was 30 ± 19 days for index injuries and 36 ± 22 days for recurrent injuries. CONCLUSIONS: An average of 7 HSIs per season per club were sustained, including a recurrence of 26%, with most injuries occurring within in-season competitive games. The biceps femoris took longer than the medial hamstrings to reach recovery milestones of running at >90% top speed, return to full training, and return to play. JOSPT Open 2024;2(4):289-296. Epub 15 July 2024. doi:10.2519/josptopen.2024.0359