Kraft und Beweglichkeit der Schulter bei koreanischen Volleyballspielern unterschiedlicher Spielklassen und Spielpositionen

Byoung Kwon Lee

Publication: Book/ReportDissertations

821 Downloads (Pure)

Abstract

The Shoulder overuse injuries are common in volleyball players, especially during spike motion. Muscle strength and range of motion of the shoulder rotation are considered to be important during spiking. It would also be worth to find out if there were differences in shoulder strength and range of motion among these volleyball players with and without shoulder injury history in order to design appropriate shoulder injury rehabilitation and prevention training programs for each player. In this study, 86 players from 4 different levels were tested, 21 from the professional league, 24 from the university league, 21 from the middle- and high school league and the rest 20 from the control group. Isokinetic concentric strength of the shoulder rotators were tested at angular velocities of 60°/s and 180°/s by using the Biodex, and passive range of motion of the shoulder rotation was assessed using with the Simi-motion. The strength test shows that the highest torque of 65.9Nm (60 °/s) on the dominant side was measured in the professional league players and it was the highest among the 4 test groups. The 48% of professional players show the lowest level of the ER/IR values and the 45% on the dominant side of professional players the lowest level of “max. IR to ER,” which is the lowest of all test player groups. According to the test results, the dominant side shows the clear limitation of elasticity of inner rotation among professional league players (compared to the non-dominant side). According to the test results in the attackers, the differences are to see in following factors like a isokinetic strength (60 °/s) of IR and ER (DS), maximal value of shoulder rotation (DS) and the ratio between the maximal ER and the IR on the dominant side. The players who were injured in the history of shoulder show the differences in the isokinetic strength of ER (60 °/s), the strength ratio between ER and IR (60 °/s) and the maximal shoulder rotation (compared to the players without injury in the past). We recommended functional exercises that improve both external rotators strength and stretching exercise for internal rotation in the dominant side during the prevention programs in volleyball players. In addition, hypermobility in the external rotation of dominant side for volleyball players should be looked over to prevent the injury.
Original languageGerman
Place of PublicationKöln
Number of pages127
Publication statusPublished - 2009

Citation