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http://dx.doi.org/10.5397/CiSE.2010.13.1.053

Comparison of Isokinetic Strength between Stage 1,2 Impingement Syndrome and Rotator Cuff Tear  

Kim, Deok-Weon (Department of Orthopedic Surgery, Inje University Seoul Paik Hospital)
Joo, Hae-Kyun (Department of Orthopedic Surgery, Inje University Seoul Paik Hospital)
Jung, Jae-Eun (Department of Orthopedic Surgery, Inje University Seoul Paik Hospital)
Publication Information
Clinics in Shoulder and Elbow / v.13, no.1, 2010 , pp. 53-57 More about this Journal
Abstract
Purpose: The goal of this study was to evaluate differences in strength deficits between (i) patients with stage 1 or 2 impingement syndrome and (ii) patients with rotator cuff tears. Materials and Methods: We enrolled 43 patients with stage 1 or 2 impingement syndrome (group 1) and 21 patients with rotator cuff tears (group 2). The isokinetic strength of both groups was evaluated at $60^{\circ}/sec$ for external rotation, internal rotation, adduction and abduction. We measured the peak torque, total work, average power of bilateral sides, peak torque relationship to body weight, and the ratio between unilateral agonist and antagonist. Results: The isokinetic strength deficits assessed in ratio of peak torque to body weight for group 1 and group 2 respectively were; $28.48{\pm}23.76%$ and $29.12{\pm}32.81%$ for abduction (p=0.929), $7.20{\pm}13.98%$ and $18.94{\pm}19.52%$; for adduction (p=0.021), $16.88{\pm}13.76%$ and $25.80{\pm}24.07%$; for external rotation (p=0.221), and $14.1{\pm}25.67%$ and $29.02{\pm}35.06%$ for internal rotation (p=0.059). For average power and total work, group 2 showed a significantly greater deficit for adduction and internal rotation than group 1. Conclusion: Those with rotator cuff tears have more isokinetic muscle strength deficits than those with stage 1 or 2 impingement syndrome. Progression from stage 1 and 2 impingement syndrome to stage 3 may result in greatest changes in strength deficits for internal rotation and adduction.
Keywords
Shoulder; Rotator cuff tear; Impingement syndrome; Isokinetic muscle strength;
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Times Cited By KSCI : 2  (Citation Analysis)
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