Comparison of shoulder external rotator muscle strength between workers with and without shoulder impingement syndrome

Not Applicable

Completed

Conditions: Diseases of the musculo-skeletal system and connective tissue

Registration Number: KCT0002396

Lead Sponsor: Yonsei University

Brief Summary: The target subjects recruited 24 people according to previous studies on muscle strength, 12 of whom were recruited as patients and 12 as healthy. Considering that there are no dropout candidates, male candidates who are 30 ~ 60 years old working in Wonju city are selected. The shoulder impingement syndrome subjects and healthy person measure the strength of the shoulder muscles during the shoulder-out-of-shoulder motion in the side-lying postures and side-lying postures. Compare the muscle asymmetry ratios with the muscle strengths of the two groups. Subjects with SIS did not exhibit significant differences in shoulder external rotator muscle strength in the side-lying position with or without the shoulder at 90° flexion relative to the control group. However, the asymmetry ratio of shoulder external rotator muscle strength differed significantly in the SIS group compared with the control group. Subjects did not show shoulder pain or adverse reactions during muscle strength measurements.

Detailed Description: Not available

Recruitment & Eligibility

Status: Completed

Sex: Male

Target Recruitment: 24

Inclusion Criteria

Subjects will be included if they reveal a positive sign in two or more SIS screening tests and in one or more the specific subacromial impingement tests. The SIS screening tests are as follows: (1) more than 1 week persistent pain in proximal anterior or lateral shoulder within 6 months; (2) a painful arc is existed during active shoulder elevation; (3) tenderness while touch of the rotator cuff tendons; (4) a pain occured when conducting resisted isometric shoulder abduction; and (5) a positive sign of Jobe’s test (empty can test). The specific subacromial impingement tests used in this study is the Neer and Hawkins tests.

Exclusion Criteria

Exclusion criteria are as follows: (1) a medical history of dislocation or traumatic injuries of the shoulder joint; or (2) an operation history of shoulder joint within the 6 months.