Validation and Inverse Analysis of The Athletic Shoulder Test (ASH).

Validation and Inverse Analysis of The Athletic Shoulder Test (ASH): Reliability of a Novel Upper Body Isometric Strength Test

To validate both the Athletic Shoulder (ASH) test, conducted on rugby players, and its inverse, the Inverse Athletic Shoulder (IASH) test, for swimmers. This involves assessing the strength relationship between shoulder flexion and extension at three different adduction angles (180º, 135º, 90º) to identify potential injuries associated with these imbalances.

Inclusion Criteria:

• High-performance swimmers.
• Aged between 14 and 18 years.
• No acute injuries in the cervical or scapular region.
• Ability to perform the ASH and IASH tests without compensatory movements.

Exclusion Criteria:

• Acute injuries in the cervical or scapular region.
• Inability to maintain proper positioning during the tests due to lack of adequate mobility or strength.
• Refusal to sign informed consent (or legal guardian's consent for minors).