Clinical trial NCT05305196: The Effects of Eccentric-focused Exercise on Posterior Shoulder Tightness in Symptomatic Overhead Athletes
Official title: The Effects of Eccentric-focused Exercise on Shoulder Mobility, Rotator Cuff Strength, Pain and Dysfunction, Scapular Kinematics and Muscle Activation in Symptomatic Overhead Athletes With Posterior Shoulder Tightness
Study type: INTERVENTIONAL
Overall status: UNKNOWN
Phase: NA
Conditions: Posterior Shoulder Tightness
Keywords: Posterior shoulder tightness
Eccentric exercise
Shoulder impingement syndrome
Lead sponsor: National Yang Ming Chiao Tung University
Sponsor class: OTHER
First posted: 2022-03-31
Enrollment: 40
Sex: ALL
Minimum age (years): 20
Maximum age (years): 50
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: TREATMENT

Brief summary: The aim of this study is to investigate the effects of shoulder eccentric exercise training on shoulder mobility, rotator cuff strength, pain and dysfunction, scapular kinematics and muscle activation in symptomatic overhead athletes with posterior shoulder tightness.

Detailed description: Overhead athletes commonly have posterior shoulder tightness due to repetitively high tensile loading during overhead throwing. However, intervention studies focused on posterior shoulder tightness in people with subacromial pain are still limited. Additionally, eccentric exercise was thought to improve the eccentric strength and neuromuscular control of posterior shoulder muscles to endure repetitively eccentric loading, which may improve posterior shoulder tightness and decrease the risk of subacromial pain. Nevertheless, no previous study investigated the influence of eccentric exercise on posterior shoulder tightness in overhead athletes. The aim of this study is to investigate the effects of shoulder eccentric exercise training on shoulder mobility, rotator cuff strength, pain and dysfunction, scapular kinematics and muscle activation in symptomatic overhead athletes with posterior shoulder tightness.

Eligibility criteria: Inclusion Criteria:

* Participate in overhead sports over 4 hours per week
* Age between 20 to 50 years old
* Glenohumeral joint range of motion deficit: Shoulder internal rotation loss more than 15 degrees compared to the non-dominant side and total arc of motion loss more than 5 degrees or/and horizontal adduction range of motion lo more than 15 degrees compared to the non-dominant side
* Shoulder impingement syndrome criteria

Exclusion Criteria:

* History of shoulder dislocation, fracture and operation
* History of direct contact in upper extremities or cervical region in the past one month
* Shoulder pain or neurological symptom caused by cervical problem
* VAS more than 5 during shoulder elevation
* Receive treatment for posterior shoulder tightness in the past 3 months

Primary outcomes:
measure: Shoulder range of motion (measured with goniometer)
timeFrame: 4 weeks
measure: Rotator cuff functional strength ratio (Pro 4, Biodex Medical Systems, Inc., Shirley, NY, USA)
timeFrame: 4 weeks
measure: Shoulder pain
timeFrame: 4 weeks
measure: Shoulder function
timeFrame: 4 weeks
measure: Shoulder endurance test
timeFrame: 4 weeks
Secondary outcomes:
measure: Electromagnetic tracking system (Liberty electromagnetic tracking system, Polhemus , Colchester, VT,)
timeFrame: 4 weeks
measure: Surface electromyography (TeleMyo 2400T G2, Noraxon USA Inc., Scottsdale, AZ, USA)
timeFrame: 4 weeks
Other outcomes:
Locations:
city: Taipei
country: Taiwan
facility: National Yang Ming Chiao Tung University
state: Beitou
Study officials:
References: