Force steadiness, muscle activity, and maximal muscle strength in subjects with subacromial impingement syndrome

摘要: We investigated the effects of subacromial impingement syndrome (SIS) on shoulder sensory-motor control and maximal muscle strength. It was hypothesized that both would be impaired due to chronic pain associated with syndrome. Nine subjects unilateral SIS who remained physically active in spite nine healthy matched controls were examined determine isometric isokinetic submaximal shoulder-abduction force steadiness at target forces corresponding 20%, 27.5%, 35% abductor torque, strength (MVC). Electromyographic (EMG) activity assessed using surface intramuscular recordings from eight muscles. Force during concentric contractions highest level only, largely unaffected. No between-group differences MVC observed. The present data suggest is only mildly are able continue upper body physical pain. Thus, should continued by patients SIS, if possible, avoid loss neural functions inactivity.