The Effects of Muscle Characteristics on the Control of Shoulder Complex During Functional Movements

Last updated: November 21, 2019
Sponsor: Tzu Chi University
Overall Status: Active - Recruiting

Phase

N/A

Condition

Tic Disorders

Tardive Dyskinesia

Dystonias

Treatment

N/A

Clinical Study ID

NCT04176692
MOST108-2314-B-320 -001-
  • Ages 13-22
  • All Genders
  • Accepts Healthy Volunteers

Study Summary

The movement control of shoulder joint relies not only on the glenohumeral joint, but also the critical contributions from scapulothoracic joint. The relating scapula muscle strength, scapula mobility and, the most important of all, the capacity of neuromuscular control should be integrated into the rehabilitation program for patients with shoulder disorders. With regarding to the subacromial impingement syndrome or rotator tendinopathy, the status of scapula dyskinesia and dysfunctions were improved significantly after the intervention of scapula-emphasized exercise. But there was no study addressed the relationships between stiffness of relating muscles and the deficits of scapula movement. The stiffness had been shown to serve an important role in functional performance of the corresponding joint. For example, the decreased elasticity of supraspinatus muscle was noticed on affected side comparing in patients with impingement syndrome.Few studies examined the effects of altered muscle stiffness on kinematic performance in shoulder complex. Laudner et al. found that the stiffer the latismuss dorsi muscle was, the less upward rotation and posterior tilting, and the more internal rotation of scapula during arm elevation was exhibited in asymptomatic swimmers. Another study showed that the increased range of external rotation and posterior tilt of scapula during arm elevation were associated with the decreased stiffness of pectoralis minor. The recent study presented that the electromyographic activities and elasticities of middle deltoid, supraspinatus, and infraspinatus muscles correlated significantly with the tissue elasticity during shoulder movement in healthy shoulder. However, there was no scientific information directly to prove the changes in characteristics of rotator cuff function as well as the impacts on kinematic control of shoulder complex. Therefore, the aim of this study is to examine the relationship among characteristics of muscle properties and kinematic control healthy swimmers.

Eligibility Criteria

Inclusion

Inclusion Criteria:

  • freestyle swimmers with health shoulders

Exclusion

Exclusion Criteria:

  • the past or current shoulder pain or disorders are examined by history taking andscreening tests: shoulder impingement syndrome, instability, bony deformity, trauma,nerve injury or entrapment.

Study Design

Total Participants: 20
Study Start date:
September 01, 2019
Estimated Completion Date:
August 01, 2020

Connect with a study center

  • Tzu Chi University

    Hualien City, 請選擇 970
    Taiwan

    Active - Recruiting

Not the study for you?

Let us help you find the best match. Sign up as a volunteer and receive email notifications when clinical trials are posted in the medical category of interest to you.