NCT07510893 Augmented Feedback Effects on Shoulder Rotator Performance

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This trial targets 20 participants in total. It began in 2026-03-01 with a primary completion date of 2026-09-01.

Brief Summary

The existing literature demonstrates that motor learning strategies are effective in enhancing sports performance. One of these strategies, augmented feedback, is widely used in athletic training to help athletes achieve their goals more effectively, support the learning process, and motivate improvements in performance. Although studies in the literature have demonstrated the positive effects of augmented feedback provided during training on performance, no study has been found that examines the acute effects of such feedback on peak force and rate of force development during isometric training of the shoulder internal and external rotator muscles. The aim of this study is to investigate the acute effects of outcome feedback on isometric peak force and rate of force development during isometric training of the shoulder internal and external rotator muscles, as well as the short-term retention of these effects. It is expected that augmented feedback on isometric peak force and rate of force development, provided during isometric training of the shoulder internal and external rotator muscles, will have both acute and short-term retention effects on strength parameters. Healthy and physically active individuals will participate in isometric strength training targeting the dominant side shoulder internal and external rotator muscles across two separate sessions. Within a randomized crossover design, all participants will perform the isometric training program under two different conditions: with augmented feedback and without augmented feedback. The order of the conditions will be determined using a computer-based randomization program.To minimize potential learning effects, a washout period of 5-7 days will be provided between the two training conditions. Testing and training protocols will be conducted using an isometric dynamometer (ForceFrame, VALD Performance, Australia). The reported intraclass correlation coefficients (ICC) of the ForceFrame dynamometer for shoulder strength measurements range between 0.85 and 0.91, indicating good to excellent test-retest reliability. All testing and training procedures will be performed in accordance with the standard testing positions recommended by the manufacturer.

Eligibility 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.

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