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CompletedNCT05966298Updated Aug 27, 2025

Investigation of the Effectiveness of Core Stabilization Training in Patients With Subacromial Impingement Syndrome

An interventional study of Core stabilization training and Standart Rehabilitation in Subacromial Impingement Syndrome, sponsored by Bandırma Onyedi Eylül University. Completed at 1 site in Turkey (Türkiye). Open to participants aged 18 Years to 65 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-08-27.

Sponsored by Bandırma Onyedi Eylül University · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
44
Allocation
Randomized
Ages
18 Years to 65 Years
Sex
All
01

Study summary

Subacromial Impingement Syndrome (SIS) is one of the most common shoulder problems. The core region is considered a kinetic link that facilitates the transfer of torque and angular momentum between the upper and lower extremities during body movements. The decrease in core stabilization affects both trunk control and the quality of extremity movements depending on the kinetic chain in the body. The improvement in core stabilization balances the load transfer between the trunk and the extremities and reduces the asymmetry between the extremities. Core stabilization training should be included in rehabilitation programs as core stabilization is adversely affected in patients with SIS. For this reason, this study was planned to examine the effects of core stabilization training applied in addition to conventional treatment in patients with SIS on pain, range of motion, shoulder muscles strenght and core stability.

02

Conditions studied

  • Subacromial Impingement Syndrome

Keywords

  • Subacromial Impingement Syndrome
  • core stabilization training
  • core stability
  • pain
  • range of motion
  • upper extremity function
  • Subacromial Impingement
  • Impingement
  • Core Stabilization Exercises
  • core stability exercises
03

In context

Shoulder Impingement Syndrome

304 studies on the registry are indexed under Shoulder Impingement Syndrome; 55 are open to participants now.

This study's enrollment of 44 is below the median of 54 across 261 interventional studies indexed under Shoulder Impingement Syndrome.

Browse Shoulder Impingement Syndrome studies →

Lead sponsor

Bandırma Onyedi Eylül University is the lead sponsor of 66 studies on the registry; 16 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 65 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • Being diagnosed with subacromial impingement syndrome,
  • Being between the ages of 18-65,
  • Not having received medical treatment,
  • Not having received a shoulder-related physiotherapy program in the last 1 year,
  • Not having undergone any shoulder-related surgery,
  • Being able to read and understand Turkish

Exclusion criteria

Exclusion Criteria:

  • Neurological deficits of the upper extremity and the presence of another orthopedic disease, rheumatic and congenital disease other than CNS
  • Presence of mental problems,
  • To have received corticosteroid treatment in the last year,
  • Having cardiovascular and systemic diseases that prevent work,
  • Pregnancy,
  • Those with communication problems
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Outcomes assessor)
Enrollment
44 participants (actual)

Study arms

  • Experimental
    Core stabilization group

    Individuals included in this group will receive 20 minutes of core stabilization training in addition to 40 minutes of standard rehabilitation. Patients will be trained 5 days a week for first 3 weeks(standart rehabilitation + core stabilization training) then will be trained 3 days a week on 4-6 week (only core stabilization training). The next 6 weeks will be given a home exercise program including shoulder exercises and core stabilization training.

    Other: Core stabilization training · Other: Standart Rehabilitation

  • Other
    Control group

    Individuals included in this group will receive only 40 minutes of standard rehabilitation. Patients will be trained 5 days a week for first 3 weeks(only standart rehabilitation). The next 9 weeks will be given a home exercise program including shoulder exercises.

    Other: Standart Rehabilitation

Interventions

  • OtherCore stabilization training

    First, while focusing on the activation methods of deep cervical flexor, transversus abdominus and multifidus muscles in individuals; In the next stages, exercises will be performed that will preserve the contraction of the deep cervical flexor, transversus abdominus and multifidus muscles and activate the other muscles of the body.

  • OtherStandart Rehabilitation

    This treatment includes shoulder exercises and conventional therapy (Infrared, TENS).

06

What researchers measure

Primary outcomes

  1. Visual Analogue Scale

    It is used to assess the severity of pain. Pain severity with Visual Analogue Scale,(0-10) higher scores indicate more pain.

    Time frame: Baseline

  2. Visual Analogue Scale

    It is used to assess the severity of pain. Pain severity with Visual Analogue Scale,(0-10)higher scores indicate more pain.

    Time frame: 3 week

  3. Visual Analogue Scale

    It is used to assess the severity of pain. Pain severity with Visual Analogue Scale,(0-10)higher scores indicate more pain.

    Time frame: 6 week

  4. Visual Analogue Scale

    It is used to assess the severity of pain. Pain severity with Visual Analogue Scale,(0-10)higher scores indicate more pain.

    Time frame: 12 week

  5. Digital dynamometer

    It will be used to measure the strength of the shoulder muscles.

    Time frame: Baseline

  6. Digital dynamometer

    It will be used to measure the strength of the shoulder muscles.

    Time frame: 3 week

  7. Digital dynamometer

    It will be used to measure the strength of the shoulder muscles.

    Time frame: 6 week

  8. Digital dynamometer

    It will be used to measure the strength of the shoulder muscles.

    Time frame: 12 week

  9. QuickDASH

    It is a questionnaire that evaluates disorders in all upper extremity functions. The QuickDASH is an abbreviated 11-question subset from the original Disabilities of the Arm, Shoulder, and Hand (DASH) questionnaire. The questionnaire's answers are scored on a 1-5 points scale that is then transformed to result in a score that ranges from 0 (indicating least disability) to 100 (indicating most disability).

    Time frame: Baseline

  10. QuickDASH

    It is a questionnaire that evaluates disorders in all upper extremity functions. The QuickDASH is an abbreviated 11-question subset from the original Disabilities of the Arm, Shoulder, and Hand (DASH) questionnaire. The questionnaire's answers are scored on a 1-5 points scale that is then transformed to result in a score that ranges from 0 (indicating least disability) to 100 (indicating most disability).

    Time frame: 3 week

  11. QuickDASH

    It is a questionnaire that evaluates disorders in all upper extremity functions. The QuickDASH is an abbreviated 11-question subset from the original Disabilities of the Arm, Shoulder, and Hand (DASH) questionnaire. The questionnaire's answers are scored on a 1-5 points scale that is then transformed to result in a score that ranges from 0 (indicating least disability) to 100 (indicating most disability).

    Time frame: 6 week

  12. QuickDASH

    It is a questionnaire that evaluates disorders in all upper extremity functions.The QuickDASH is an abbreviated 11-question subset from the original Disabilities of the Arm, Shoulder, and Hand (DASH) questionnaire. The questionnaire's answers are scored on a 1-5 points scale that is then transformed to result in a score that ranges from 0 (indicating least disability) to 100 (indicating most disability).

    Time frame: 12 week

  13. Stabilizer pressure biofeedback device

    This device will be used to measure deep cervical flexor muscles endurance.

    Time frame: Baseline

  14. Stabilizer pressure biofeedback device

    This device will be used to measure deep cervical flexor muscles endurance.

    Time frame: 3 week

  15. Stabilizer pressure biofeedback device

    This device will be used to measure deep cervical flexor muscles endurance.

    Time frame: 6 week

  16. Stabilizer pressure biofeedback device

    This device will be used to measure deep cervical flexor muscles endurance.

    Time frame: 12 week

  17. Modified "Biering-Sorensen" test

    Test will be applied to assess the endurance of the core muscles. The subjects are positioned in the prone position. The subjects are asked to extend their upper body straight forward from the edge of the table. How long the patient was able to perform the test was recorded in seconds.

    Time frame: Baseline

  18. Modified "Biering-Sorensen" test

    Test will be applied to assess the endurance of the core muscles. The subjects are positioned in the prone position. The subjects are asked to extend their upper body straight forward from the edge of the table. How long the patient was able to perform the test was recorded in seconds.

    Time frame: 3 week

  19. Modified "Biering-Sorensen" test

    Test will be applied to assess the endurance of the core muscles. The subjects are positioned in the prone position. The subjects are asked to extend their upper body straight forward from the edge of the table. How long the patient was able to perform the test was recorded in seconds.

    Time frame: 6 week

  20. Modified "Biering-Sorensen" test

    Test will be applied to assess the endurance of the core muscles. The subjects are positioned in the prone position. The subjects are asked to extend their upper body straight forward from the edge of the table. How long the patient was able to perform the test was recorded in seconds.

    Time frame: 12 week

  21. Trunk flexors endurance test

    Test will be applied to assess the endurance of the core muscles. Participants will be positioned with trunk flexed to 60º, knees and hips to 90º flexion. The evaluator fixes the feet on the ground by supporting them from the toes. When the 60º trunk flexion is broken, the test will be terminated. How long the patient was able to perform the test was recorded in seconds.

    Time frame: Baseline

  22. Trunk flexors endurance test

    Test will be applied to assess the endurance of the core muscles. Participants will be positioned with trunk flexed to 60º, knees and hips to 90º flexion. The evaluator fixes the feet on the ground by supporting them from the toes. When the 60º trunk flexion is broken, the test will be terminated. How long the patient was able to perform the test was recorded in seconds.

    Time frame: 3 week

  23. Trunk flexors endurance test

    Test will be applied to assess the endurance of the core muscles. Participants will be positioned with trunk flexed to 60º, knees and hips to 90º flexion. The evaluator fixes the feet on the ground by supporting them from the toes. When the 60º trunk flexion is broken, the test will be terminated. How long the patient was able to perform the test was recorded in seconds.

    Time frame: 6 week

  24. Trunk flexors endurance test

    Test will be applied to assess the endurance of the core muscles. Participants will be positioned with trunk flexed to 60º, knees and hips to 90º flexion. The evaluator fixes the feet on the ground by supporting them from the toes. When the 60º trunk flexion is broken, the test will be terminated. How long the patient was able to perform the test was recorded in seconds.

    Time frame: 12 week

  25. Lateral bridge test

    Test will be applied to assess the endurance of the core muscles. The subjects were asked to lie on their side, raise their bodies on their forearms and toes and maintain this position(both sides). How long the patient was able to perform the test was recorded in seconds.

    Time frame: Baseline

  26. Lateral bridge test

    Test will be applied to assess the endurance of the core muscles. The subjects were asked to lie on their side, raise their bodies on their forearms and toes and maintain this position(both sides). How long the patient was able to perform the test was recorded in seconds.

    Time frame: 3 week

  27. Lateral bridge test

    Test will be applied to assess the endurance of the core muscles. The subjects were asked to lie on their side, raise their bodies on their forearms and toes and maintain this position(both sides). How long the patient was able to perform the test was recorded in seconds.

    Time frame: 6 week

  28. Lateral bridge test

    Test will be applied to assess the endurance of the core muscles. The subjects were asked to lie on their side, raise their bodies on their forearms and toes and maintain this position(both sides). How long the patient was able to perform the test was recorded in seconds.

    Time frame: 12 week

  29. Prone bridge test

    Test will be applied to assess the endurance of the core muscles. The subjects put their elbows on the ground as the starting position and open their feet about the width of their hips while keeping their body straight. The tests end when the subjects break the test positions. How long the patient was able to perform the test was recorded in seconds.

    Time frame: Baseline

  30. Prone bridge test

    Test will be applied to assess the endurance of the core muscles. The subjects put their elbows on the ground as the starting position and open their feet about the width of their hips while keeping their body straight. The tests end when the subjects break the test positions. How long the patient was able to perform the test was recorded in seconds.

    Time frame: 3 week

  31. Prone bridge test

    Test will be applied to assess the endurance of the core muscles. The subjects put their elbows on the ground as the starting position and open their feet about the width of their hips while keeping their body straight. The tests end when the subjects break the test positions. How long the patient was able to perform the test was recorded in seconds.

    Time frame: 6 week

  32. Prone bridge test

    Test will be applied to assess the endurance of the core muscles. The subjects put their elbows on the ground as the starting position and open their feet about the width of their hips while keeping their body straight. The tests end when the subjects break the test positions. How long the patient was able to perform the test was recorded in seconds.

    Time frame: 12 week

  33. Modified "Push-ups" test

    Test will be applied to assess the strength of the core muscles. The subjects are positioned in the prone position with their hands shoulder-width apart and elbows and knees flexed. The subjects were asked to raise their body up by extending their elbows. The number of times the patient repeats the movement in 30 seconds is recorded.

    Time frame: Baseline

  34. Modified "Push-ups" test

    Test will be applied to assess the strength of the core muscles. The subjects are positioned in the prone position with their hands shoulder-width apart and elbows and knees flexed. The subjects were asked to raise their body up by extending their elbows. The number of times the patient repeats the movement in 30 seconds is recorded.

    Time frame: 3 week

  35. Modified "Push-ups" test

    Test will be applied to assess the strength of the core muscles. The subjects are positioned in the prone position with their hands shoulder-width apart and elbows and knees flexed. The subjects were asked to raise their body up by extending their elbows. The number of times the patient repeats the movement in 30 seconds is recorded.

    Time frame: 6 week

  36. Modified "Push-ups" test

    Test will be applied to assess the strength of the core muscles. The subjects are positioned in the prone position with their hands shoulder-width apart and elbows and knees flexed. The subjects were asked to raise their body up by extending their elbows. The number of times the patient repeats the movement in 30 seconds is recorded.

    Time frame: 12 week

  37. Sit-ups test

    Test will be applied to assess the strength of the core muscles. The subjects are asked to flex the trunk while the knees are flexed in the supine position. During the test, the feet of subjects are stabilized. The number of times the patient repeats the movement in 30 seconds is recorded.

    Time frame: Baseline

  38. Sit-ups test

    Test will be applied to assess the strength of the core muscles. The subjects are asked to flex the trunk while the knees are flexed in the supine position. During the test, the feet of subjects are stabilized. The number of times the patient repeats the movement in 30 seconds is recorded.

    Time frame: 3 week

  39. Sit-ups test

    Test will be applied to assess the strength of the core muscles. The subjects are asked to flex the trunk while the knees are flexed in the supine position. During the test, the feet of subjects are stabilized. The number of times the patient repeats the movement in 30 seconds is recorded.

    Time frame: 6 week

  40. Sit-ups test

    Test will be applied to assess the strength of the core muscles. The subjects are asked to flex the trunk while the knees are flexed in the supine position. During the test, the feet of subjects are stabilized. The number of times the patient repeats the movement in 30 seconds is recorded.

    Time frame: 12 week

07

Study locations

1 site
  • Eren Özen
    Bandırma, Balıkesir 10200, Turkey (Türkiye)
08

References and documents

Publications

  • Ozen E, Ozen MS, Kaya Mutlu E. The effects of core stabilization training in patients with subacromial impingement syndrome: a single-blind randomized controlled study. Disabil Rehabil. 2026 Feb 10:1-15. doi: 10.1080/09638288.2026.2627617. Online ahead of print. PubMed 41667391 ↗

Individual participant data

Plan to share: No

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 27, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05966298
Lead sponsor
Bandırma Onyedi Eylül University
Responsible party
Eren Ozen (Principal Investigator, Bandırma Onyedi Eylül University) — Principal investigator
First posted
Jul 28, 2023
Start date
Aug 1, 2023
Primary completion
Aug 1, 2024
Completion
Aug 1, 2024
Last update
Aug 27, 2025

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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