Outcome feedback to improve shoulder rotator force and speed

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

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.

Why it matters

Who can join: the full rules

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 it's running

• 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

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

• Device-assisted balance training for shoulder impingement

  This study tests whether adding device-assisted balance training to standard physiotherapy helps reduce pain and improve function for adults with shoulder impingement.

  Recruiting Istanbul Gedik University · Istanbul · NCT07917689

• Eccentric Hamstring Training vs Sprint-Specific Training for Hamstring Performance in Young Athletes

  This study tests whether three hamstring training approaches (eccentric, sprint-based, and Romanian deadlift with Nordic hamstring) improve hamstring structure and sprint-related performance in healthy young athletes.

  Recruiting University of Wisconsin, Madison · Madison, Wisconsin · NCT07716319

• How the menstrual cycle and birth control affect strength and performance in athletes

  This study tests how natural menstrual cycle phases and monophasic birth control influence strength, hydration, and energy balance in female athletes.

  Recruiting Faculdade de Motricidade Humana · Cruz Quebrada, Oeiras · NCT07591818

• Pain and moderate exercise in midlife former athletes, masters athletes, and nonathletes

  This trial tests if moderate-intensity strength versus aerobic exercise changes pain before and after workouts in adults aged 35–65 who are former competitive athletes, current master's athletes, or nonathletes.

  Recruiting Marquette University · Milwaukee, Wisconsin · NCT07502742

• Reducing bacterial contamination during primary shoulder replacement

  This trial tests whether putting Prontosan antimicrobial gel on the dermal layer after the skin is cut can lower Cutibacterium acnes growth in men having primary shoulder replacement.

  Recruiting St. Louis University · St Louis, Missouri · NCT07406893

• Blood-based markers linked to aerobic (VO₂max/VO₂peak) fitness

  This project will try a blood test to see if it can predict VO₂max/VO₂peak in adults who can safely complete maximal exercise testing.

  Recruiting VO Health, Inc. · New Haven, Connecticut · NCT07393841

How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.