Outcome feedback to improve shoulder rotator force and speed
Immediate and Retention Effects of Augmented Feedback on Isometric Peak Force and Rate of Force Development of Shoulder Rotators
This study will test whether giving athletes immediate outcome feedback during static shoulder exercises helps them produce more peak force and develop force faster.
Quick facts
| Phase | Not applicable |
|---|---|
| Study type | Interventional |
| Enrollment | 20 (estimated) |
| Ages | 18 Years to 30 Years |
| Sex | All |
| Sponsor | Hacettepe University Academic / other |
| Locations | 1 site (Ankara, Sıhhıye) |
| Trial ID | NCT07510893 on ClinicalTrials.gov |
What this trial studies
Healthy, active adults will complete a standardized warm-up and a familiarization session before performing isometric internal and external shoulder rotations using an isometric dynamometer (ForceFrame). Participants will perform repeated five-second isometric contractions with the shoulder and elbow positioned at 90° while researchers provide augmented outcome feedback in the feedback condition and withhold it in the control condition. The primary measures are isometric peak force and rate of force development, and the protocol includes a short-term retention test to see if effects persist. The study excludes participants with current shoulder pain, recent upper-limb injury, or systemic medical conditions and is conducted in-person at Hacettepe University in Ankara.
Who should consider this trial
Good fit: Ideal candidates are healthy, physically active adults aged 18–30 with BMI under 30, a Tegner activity score of 5 or higher, full shoulder range of motion, and no recent upper-extremity injuries.
Not a fit: People with current shoulder pain, positive shoulder clinical tests, recent upper-extremity injury or surgery, or major medical conditions (e.g., cardiovascular disease, diabetes, obesity) are excluded and unlikely to benefit from this protocol.
Why it matters
Potential benefit: If successful, providing immediate outcome feedback during shoulder training could help athletes increase rotator muscle strength and the speed at which those muscles produce force.
How similar studies have performed: Previous motor learning and augmented feedback studies in sports have shown performance benefits, but the acute effects on isometric shoulder rotator peak force and rate of force development have not been directly tested.
Eligibility criteria
Show full inclusion / exclusion criteria
Inclusion Criteria: * Healthy individuals aged between 18 and 30 years, * Body Mass Index (BMI) below 30 kg/m², * An activity level of 5 or higher according to the Tegner Activity Scale, * Full active range of motion (ROM) in shoulder flexion, abduction, internal, and external rotation. Exclusion Criteria: * Resence of current pain complaints, * Provocation of symptoms during at least one of the specific shoulder clinical tests (Neer Test, Hawkins-Kennedy Test, Jobe Test, Resisted External Rotation Test, and Apprehension Test), * History of any upper extremity injury, pain, or surgical intervention within the past 12 months, * Presence or history of hypertension, cardiovascular diseases, peripheral vascular diseases, deep vein thrombosis, neurological disorders, systemic inflammation, diabetes, cancer, or obesity, * Unwillingness to participate in the study.
Where this trial is running
Ankara, Sıhhıye
- Hacettepe University, Faculty of Physical Therapy and Rehabilitation, — Ankara, Sıhhıye, Turkey (Türkiye) (Recruiting)
Study contacts
- Study coordinator: Elif Turgut, PhD, PT
- Email: elif.turgut.pt@gmail.com
- Phone: +905442645600
How to participate
- Review the eligibility criteria above with your treating physician.
- Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
- Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.