This program has been designed to improve shoulder stability, muscular strength, and overall performance. The exercise protocol to be implemented consists of the Thrower's Ten Exercise Program.

Thrower's Ten Exercise Program: The Thrower's Ten Exercise Program, originally developed by Kevin E. Wilk and colleagues (1993), comprising ten different exercises, will be applied to both the experimental and control groups. The exercises included in this program are as follows:

1.a. Diagonal Pattern D2 Extension

1. b. Diagonal Pattern D2 Flexion
2. a. External Rotation at 0° Abduction

2.b. Internal Rotation at 0° Abduction 2.c. External Rotation at 90° Abduction 2.d. Internal Rotation at 90° Abduction 3. Shoulder Abduction at 90° 4. Scaption (Scapular Plane Elevation) with External Rotation 5. Side-Lying External Rotation 6.a. Prone Horizontal Abduction (Neutral) 6.b. Prone Horizontal Abduction (Full Range of Motion, 100° Abduction) 6.c. Prone Rowing 6.d. Prone Rowing with External Rotation 7

The Thrower's Ten exercises will be performed using a neutral attentional focus approach.

The exercise protocol to be implemented consists of the Thrower's Ten Exercise Program.

Thrower's Ten Exercise Program: The Thrower's Ten Exercise Program, originally developed by Kevin E. Wilk and colleagues (1993), comprising ten different exercises, will be applied to both the experimental and control groups. In the experimental group, an external focus of attention strategy will be employed, directing participants' attention away from their body movements toward external targets (e.g., a target board used in conjunction with a laser pointer) during the execution of the exercises.

The Upper Extremity Y Balance Test (UEYBT) will be used to assess shoulder stability and dynamic balance. Participants will perform reach movements in three directions (anterior, posterolateral, and posteromedial), and the reach distance will be recorded. Three trials will be performed for each direction, and the maximum reach distance will be used for analysis. The UEYBT will be conducted for both the dominant and non-dominant upper extremities.

Participants will begin the test in a push-up (plank) position. In this position, one hand will be placed at the center of the Y Balance Test apparatus, while both feet will remain in contact with the ground, positioned shoulder-width apart. While maintaining this position, participants will reach maximally in three directions (medial, superolateral, and inferolateral) with the contralateral upper extremity (15). After each reach, participants will return to the starting position without compromising the push-up posture.

The Closed Kinetic Chain Upper Extremity Stability Test (CKCUEST) will be used to assess shoulder stability and functional performance. In this test, participants will assume a push-up position and alternately touch the contralateral hand in a cross-over manner, with the number of touches completed within 15 seconds recorded.

For the CKCUEST, participants will be positioned in a push-up stance, with their hands placed 92 cm apart, perpendicular to the body. Participants will be instructed to alternately touch the opposite hand as quickly as possible for 15 seconds. Each participant will perform two trials with a 1-minute rest interval between trials. The number of touches will be recorded by the evaluators. Trials will be considered invalid if the participant fails to reach the predetermined hand position or is unable to maintain the proper support position.