Background: To assess the impact of pre-season clinical measures and rotator muscles strength on the risk of significant shoulder injury (SSI) in elite badminton players Design: Prospective cohort study Participants: Nineteen elite adolescents badminton players were included and followed over the badminton season (from september 2018 to may 2019 and/or from september 2019 to may 2020) . Independent variables: A pre-season visit consisted in clinical and isokinetic shoulder strength testing. Clinical testing consisted in the shoulder range of motion (ROM) measurements and the table-to-acromion distance (TAD)Isokinetic internal and external rotator shoulder muscles strength was tested at 60 and 240°/s. Conventional and functional (eccentric-to-concentric) ratios (FR) were calculated. SSI collection was performed by an experienced sport physician.
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Baseline Isokinetic strength testing (peak torques)
Timeframe: one preseason evaluation (september 2018 or september 2019)
Baseline Isokinetic strength testing (ratios)
Timeframe: one preseason evaluation (september 2018 or september 2019)
Clinical measurements, ROM
Timeframe: ne evaluation, one preseason visit (september 2018 or september 2019)
Clinical measurements TAD
Timeframe: one preseason visit (september 2018 or september 2019)
Significant Shoulder Injury (SSI) collection (number of injury)
Timeframe: During the badminton season, the number (number, n) of injury was recorded from september 2018 to may 2019 or from september 2019 to may 2020
Significant Shoulder Injury (SSI) collection (type of injury)
Timeframe: During the badminton season, the type of injury (number, n) was recorded from september 2018 to may 2019 or from september 2019 to may 2020
Significant Shoulder Injury (SSI) collection (time lost from participation)
Timeframe: During the badminton season, the time lost from participation was recorded (in days) from september 2018 to may 2019 or from september 2019 to may 2020