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Journal of the Korean Academy of Rehabilitation Medicine 2007;31(6):730-734.
Tendon Diameter of Rotator Cuff and Strength of the Shoulder External/Internal Rotator Muscles in Elite Thrower.
Bang, In Keol , Lee, Jeong Pil , Kim, Young Joo , Kim, Chul , Kim, Gwang Hae , Reu, Hyun Woo , Oh, Jae Keun
1Department of Rehabilitation Medicine, Sanggyepaik Hospital, Inje University College of Medicine, Korea. christian6801@hanmail.net
2Korea National Sport University, Korea.
3Clinics of Yonsei Orthopaedic Surgery, Korea.
엘리트 투척선수에서 회전근개 건의 직경과 어깨의 외회전 및 내회전 근력
방인걸, 이정필1, 김영주, 김철, 김광해2, 류현우, 오재근1
인제대학교 의과대학 재활의학교실, 1한국체육대학교, 2연세정형외과 의원
Abstract
Objective
To know the characteristics of muscle strength and tendon diameter of rotator cuff in the elite thrower and correlation between both parameters.
Method
Twenty-four elite throwers (male 16, female 8) without pain and injury were included. Dominant hand was right side in all subjects. Thickness and width of rotator cuff except teres minor were measured with ultrasonography. Concentric strengths of shoulder internal (IR) and external rotators (ER) were measured with isokinetic device.
Results
There was no difference between dominant and nondominant shoulder in tendon diameter except that thickness and width of dominant infraspinatus were greater than nondominant. ER/IR peak torque ratio was about 1.0 in both sides. There were significant correlations between subscapularis thickness and IR strength, infraspinatus width and ER strength, supraspinatus thickness and ER strength, supraspinatus width and ER strength, infraspinatus thickness and IR strength, infraspinatus width and IR strength in nondominant side, and subscapularis thickness and ER strength in dominant side.
Conclusion
It is possible that external rotation peak torque is increased in elite thrower. Muscle strength could not be expected by tendon diameter except nondomiant subscapular thickness and infraspinatus width. This study will be the basis of the next study about elite thrower. (J Korean Acad Rehab Med 2007; 31: 730-734)
Key Words: Muscle strength, Tendon diameter, Rotator cuff, Elite thrower
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