NCT03474705

Clinical Outcomes, Viscoelastic Properties and Central Pain Mechanisms After Eccentric Training in Neck/Shoulder Pain

Clinical Outcomes, Muscle Stiffness and Creep, and Central Pain Mechanisms Are Improved After Eccentric Training in Female Computer Users With Chronic Neck/Shoulder Pain

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 20 (actual)
• Sponsor: University of Seville · Academic / Other
• Sex: Female
• Age: 18 Years – 65 Years
• Healthy volunteers: Not accepted

Summary

Objectives: The aims are to 1) evaluate the clinical impact of eccentric training in female computer users with chronic NSP, 2) compare pressure hyperalgesia, temporal summation of pain (TSP), and conditioned pain modulation (CPM) in female office workers with and without NSP, and 3) assess changes in central pain responses after training. Methods: In part A, twenty office workers with NSP will be compared with 20 healthy controls. In part B, the NSP group will undergo a 5-week eccentric training program. Participants will report their pain intensity, and complete the Neck Disability Index, and the Disabilities of the Arm, Shoulder and Hand questionnaire. Pressure pain thresholds (PPTs) will be assessed over the neck and forearm. Cuff algometry will identify pain detection (PDT) and tolerance thresholds (PTT). TSP will be evaluated by visual analogue scale pain scores during 10 repetitive cuff stimulations. CPM will be calculated as the difference in PDT with and without a conditioning painful stimulus. Outcomes will be measured at baseline and post-intervention.

Conditions

• Neck Pain
• Work-related Injury
• Shoulder Pain

Interventions

Type	Name	Description
DEVICE	Eccentric Training Protocol	A custom-built dynamic shoulder dynamometer (Aalborg University, Aalborg, Denmark) will be used. Participants will be seated with back support and no feet support. The maximal voluntary contraction (MVC) of the painful side will be assessed. Sessions will start with a 5-min warm-up. After that, participants will sit in the dynamometer, and the range of shoulder elevation (highest and lowest vertical position) will be measured for the affected side. During training, subjects will have to counteract a dynamometer vertical force from the highest to the lowest shoulder position at a force equal to 60% (training sessions 1-3), 70% (training sessions 4-6), and 80% (training sessions 7-10) of the MVC recorded during baseline. Three bouts of 10 repetitions (sessions 1-3), 8 repetitions (sessions 4-6) and 6 repetitions (sessions 7-10) will be performed, with a 3-second rest between contractions and a 2-minute break between bouts.

Timeline

• Start date: 2018-05-02
• Primary completion: 2018-08-30
• Completion: 2018-09-30
• First posted: 2018-03-22
• Last updated: 2018-12-27

Locations

1 site across 1 country: Spain