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

NCT04176692 | Unknown

• 1 other identifier: MOST108-2314-B-320 -001-
• Study Type: observational
• Target: 20
• Locations: 1 country
• Sites: 1

Brief 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.

Conditions

Other Instability of Joint, Shoulder Region; Strain of Shoulder Muscle (Disorder); Movement Disorders

Keywords

scapula dyskinesia; muscle stiffness; scapulohumeral rhythm; electromyography

Outcome Measures

Primary Outcomes (2)

• scapulohumeral kinematics

  the three-dimensional movements of humerus-to-trunk and scapula-to-trunk motions (degree) measured by the electromagnetic motion capture system

  through study completion, an average 11 months

• muscle activities

  muscle activitiy of upper trapezius, middle deltoid, serratus anterior, infraspinatus, lower trapezius recorded by the surface electromyography

  through study completion, an average 11 months

Secondary Outcomes (2)

• muscle strength

  through study completion, an average 11 months

• muscle stiffness

  through study completion, an average 11 months

Eligibility Criteria

• Age: 13 Years - 22 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Child (0-17), Adult (18-64)
• Sampling Method: Non-Probability Sample

Study Population

adolescent swimmers in junior or senior high school swimming team with regular training

You may qualify if:

• freestyle swimmers with health shoulders

You may not qualify if:

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

Sponsors & Collaborators

• Tzu Chi University: lead

Study Sites (1)

Tzu Chi University

Hualien City, 請選擇, 970, Taiwan

RECRUITING

MeSH Terms

Conditions

Movement Disorders

Condition Hierarchy (Ancestors)

Central Nervous System Diseases; Nervous System Diseases

Study Officials

• Po-Tsun Chen

  Tzu Chi University

  PRINCIPAL INVESTIGATOR

Central Study Contacts

Po-Tsun Chen

CONTACT

886-3-856-5301; ptchen120@mail.tcu.edu.tw

Study Design

• Study Type: observational
• Observational Model: CASE CONTROL
• Time Perspective: CROSS SECTIONAL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Principal Investigator

Study Record Dates

• First Submitted: November 16, 2019
• First Posted: November 25, 2019
• Study Start: September 1, 2019
• Primary Completion: August 1, 2020
• Study Completion: August 1, 2020
• Last Updated: November 25, 2019

Record last verified: 2019-11

Data Sharing

• IPD Sharing: Will not share

Locations

TW (1)