1. Preseason shoulder rotational isokinetic strength and shoulder injuries in volleyball players
- Author
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Primož Pori, Tine Sattler, Vedran Hadžić, Edvin Dervišević, and Alen Hadžić
- Subjects
musculoskeletal diseases ,medicine.medical_specialty ,business.industry ,Biophysics ,Isokinetic strength ,Physical Therapy, Sports Therapy and Rehabilitation ,030229 sport sciences ,03 medical and health sciences ,0302 clinical medicine ,Physical medicine and rehabilitation ,Medicine ,Orthopedics and Sports Medicine ,business ,human activities ,030217 neurology & neurosurgery - Abstract
BACKGROUND: Rotator cuff weakness is considered an important risk factor for shoulder injuries in volleyball. OBJECTIVE: To evaluate association of shoulder preseason strength status with shoulder injury occurrence in subsequent season. METHODS: Volleyball players (N= 181; 99 men) from Slovenian 1st and 2nd national league volunteered to participate in this prospective cohort study. Preseason isokinetic testing of the shoulder was conducted at 60∘/s in the concentric mode of contraction over a RoM of 60∘ with five repetitions of internal (IR) and external (ER) rotation. During the subsequent season the players reported shoulders injuries through a weekly questionnaire. RESULTS: During the season we have registered 14 (7.7%) shoulder injuries (10 in men). All injuries affected the dominant shoulder. There was significant preseason weakness of ER and lower ER/IR strength ratio in players with shoulder injury. Normal strength ratio ER/IR was a significant protective factor (Exp (B) = 0.217, 95% C.I. 0.058–0.811) for shoulder injury occurrence when controlled for sex and previous injury. CONCLUSIONS: The inclusion of systematic strengthening of the external rotators of the shoulder is necessary, especially for male volleyball players, as part of preventive measures for the prevention of shoulder injuries.
- Published
- 2022