Immediate and Retention Effects of Augmented Feedback on Isometric Peak Force and Rate of Force Development of Shoulder Rotators

What this Trial Is About

Researchers are investigating the immediate and short-term effects of augmented feedback on shoulder muscle strength and performance. This study focuses on how real-time quantitative feedback during isometric training affects peak force and rate of force development of the shoulder's internal and external rotator muscles. The trial includes healthy, physically active adults aged 18 to 30, aiming to enhance understanding of performance improvement strategies in shoulder training. Participants will complete two training sessions involving isometric strength exercises for the dominant shoulder rotator muscles. They will perform the exercises under two conditions in random order: with augmented feedback and without feedback. The augmented feedback provides immediate quantitative information on force and rate of force development after each contraction. Between sessions, a 5-7 day washout period is included. Warm-up, familiarization, testing, and training use a specialized isometric dynamometer to measure strength and rate of force development precisely. During each session, participants undergo a warm-up, familiarization with the testing device, and three strength tests before, immediately after, and 15 minutes after training to assess retention. The isometric training consists of three 5-second maximal contractions with rest periods. Measurements of peak force and rate of force development are recorded at each test. The study monitors performance changes and retention of strength gains, using standardized positions and verbal instructions to ensure consistent execution throughout the trial.

Augmented Feedback Effects on Shoulder Rotator Performance