Please use this identifier to cite or link to this item: http://hdl.handle.net/11452/21592
Title: Shoulder terminal range eccentric antagonist/concentric agonist strength ratios in overhead athletes
Authors: Yıldız, Yusuf
Aydın, Taner
Hazneci, Bülent
Kalyon, T. Alp
Kıralp, Mehmet Zeki
Uludağ Üniversitesi/Tıp Fakültesi/Spor Hekimliği Anabilim Dalı.
0000-0003-2735-8697
Sekir, Ufuk
R-5044-2018
AAM-4348-2020
8086677600
Keywords: Sport sciences
Terminal range
Strength ratio
Eccentric antagonist
Concentric agonist
Joint
Plane
Injury
Players
Velocity
Rotator muscles
Muscle strength
Concentric-strength
Professional baseball pitchers
Issue Date: 2006
Publisher: Wiley
Citation: Yıldız, Y. vd. (2006). ''Shoulder terminal range eccentric antagonist/concentric agonist strength ratios in overhead athletes''. Scandinavian Journal of Medicine and Science in Sports, 16(3), 174-180.
Abstract: Objective: The agonist-antagonist strength relationship for shoulder external rotation and internal rotation was formerly described by the relatively more functional ratios of eccentric external rotator to concentric internal rotator moments, and eccentric internal rotator to concentric external rotator moments for the entire range of motion. The aim of this study was to provide descriptive data for terminal range eccentric antagonist/concentric agonist rotator cuff strength in overhead athletes. Methods: The dominant and non-dominant shoulders of 40 asymptomatic military overhead athletes were tested through a range of 20 degrees of external rotation to 90 degrees of internal rotation using the Cybex NORM isokinetic dynamometer at a speed of 90 degrees/s. Differences between the dominant and non-dominant shoulders were assessed using the paired samples t-test. Results: The terminal range ratios during external rotation (20 degrees of internal rotation -10 degrees of external rotation) were found to be 2.09 and 1.58 for the dominant and non-dominant shoulders, respectively, whereas the terminal range ratios during internal rotation (60-90 degrees of internal rotation) were 1.03 and 1.19 for the dominant and non-dominant shoulders, respectively. These ratio differences between the dominant and non-dominant shoulders were significant (P < 0.01 for external and internal rotation). Conclusion: The muscle torque ratios of eccentric antagonist/concentric agonist are different between dominant and non-dominant shoulders of skilled overhead athletes at terminal ranges. This functional assessment of strength testing that reflects dynamic shoulder joint stability during the throwing activity at these specific ranges may provide valuable information either during preventive exercise programs or in the evaluation of the injured shoulder of the overhead athlete. We recommended functional exercises that improve eccentric external rotation strength on the dominant shoulder during the rehabilitation and prevention programs in overhead athletes.
URI: https://doi.org/10.1111/j.1600-0838.2005.00471.x
https://onlinelibrary.wiley.com/doi/10.1111/j.1600-0838.2005.00471.x
http://hdl.handle.net/11452/21592
ISSN: 0905-7188
1600-0838
Appears in Collections:Scopus
Web of Science

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