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The Effects of Exercise Training on Shoulder Neuromuscular Control

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ClinicalTrials.gov Identifier: NCT02164305
Recruitment Status : Completed
First Posted : June 16, 2014
Last Update Posted : September 14, 2017
Sponsor:
Information provided by (Responsible Party):
University of Oregon

Brief Summary:
Dynamic control of the rotator cuff muscles plays an important role in stabilizing the shoulder during motion. Impairment in the neuromuscular control of these muscles may to lead to injury and pain. Rehabilitation programs have moderate success in decreasing pain and improving shoulder function. While most of these programs target the rotator cuff, it is still unknown if they serve to improve the neuromuscular control of the rotator cuff muscles. The rehabilitation may induce neurological and physiologic changes in neuromuscular structures and thus alter the neuromuscular control of the entire shoulder complex. Kinematics and electromyographic (EMG) activities have been widely used to study neuromuscular control. However, corticospinal excitability, which has been widely examined in the patients with neurological disorders, provides a more detailed account of central control from the primary motor cortex through the spinal cord to the muscles. This assessment of neuromuscular control will serve to illuminate the ability of the shoulder muscles to handle the stress from activities such as overhead sports activities and carrying or lifting heavy objects. This approach could be used to help design efficient training program for athletes and effective rehabilitation program for patients with shoulder injuries. The purpose of the proposed study is to investigate the effect of exercise treatment effect on the proprioception, kinematics, EMG and corticospinal excitability of shoulder muscles, including the deltoid and rotator cuff muscles.

Condition or disease Intervention/treatment Phase
Shoulder Impingement Other: Strengthening group Other: Neuromuscular group Other: Control Not Applicable

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 42 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Participant)
Primary Purpose: Treatment
Official Title: The Effects of Exercise Training on Shoulder Neuromuscular Control
Study Start Date : May 2014
Actual Primary Completion Date : September 2015
Actual Study Completion Date : October 2015

Arm Intervention/treatment
Experimental: Strengthening group
4-week exercise training, 3 times a week, 30 minutes per visit.
Other: Strengthening group
Open-chain exercise for rotator cuff and scapular muscles

Experimental: Neuromuscular group
4-week exercise training, 3 times a week, 30 minutes per visit
Other: Neuromuscular group
Closed-chain exercise for shoulder muscles

Sham Comparator: Control
Only have 2 assessments.
Other: Control
No exercise training




Primary Outcome Measures :
  1. Change from baseline in muscle activity of rotator cuff and scapular muscles at 4 weeks [ Time Frame: Baseline and 4 weeks ]

Secondary Outcome Measures :
  1. Change from baseline in elevation force at 4 weeks [ Time Frame: Baseline and 4 weeks ]
  2. Change from baseline in proprioception errors at 4 weeks [ Time Frame: Baseline and 4 weeks ]
  3. Change from baseline in the amplitude of motor evoked potential of rotator cuff at 4 weeks [ Time Frame: Baseline and 4 weeks ]


Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 50 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Healthy subjects

Exclusion Criteria:

  • Less than 135 degrees of active humeral elevation in the scapular plane
  • Prior shoulder and cervical surgery
  • Presence of shoulder and neck pain
  • Had history of head, cervical or shoulder pain or pathology
  • Stroke and neurological impairment
  • History of seizures
  • Taking anti-seizure and anti-depressive medication
  • With pacemaker and other magnetic implant
  • Pregnancy
  • Athletes performing upper extremity exercise

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02164305


Locations
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United States, Oregon
University of Oregon
Eugene, Oregon, United States, 97403
Sponsors and Collaborators
University of Oregon
Investigators
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Study Director: Andrew Karduna, PhD Department of Human Physiology at University of Oregon
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Responsible Party: University of Oregon
ClinicalTrials.gov Identifier: NCT02164305    
Other Study ID Numbers: 07252013.032
First Posted: June 16, 2014    Key Record Dates
Last Update Posted: September 14, 2017
Last Verified: September 2017
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No
Keywords provided by University of Oregon:
Rotator cuff muscle
Excitability
Proprioception
Kinematics
Muscle activity
Electromyography
Additional relevant MeSH terms:
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Shoulder Impingement Syndrome
Joint Diseases
Musculoskeletal Diseases
Shoulder Injuries
Wounds and Injuries