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

Intraclass Correlation Coefficient (ICC) for ASH Test

Assessment of between-day reliability of the ASH test using intraclass correlation coefficients (ICC) for shoulder extension at three adduction angles (180º, 135º, 90º).

Time frame: Measured at two time points: baseline (Day 0) and follow-up (Day 2).

Intraclass Correlation Coefficient (ICC) for IASH Test

Assessment of between-day reliability of the IASH test using intraclass correlation coefficients (ICC) for shoulder flexion at three adduction angles (180º, 135º, 90º).

Time frame: Measured at two time points: baseline (Day 0) and follow-up (Day 2).

Coefficient of Variation (CV) for ASH and IASH Tests

Analysis of the coefficient of variation (CV) to evaluate data dispersion and consistency for both ASH and IASH tests.

Time frame: Measured at two time points: baseline (Day 0) and follow-up (Day 2).

Minimum Detectable Change (MDC) for ASH and IASH Tests

Calculation of the minimum detectable change (MDC) to identify the smallest significant change in performance beyond measurement error for both ASH and IASH tests.

Time frame: Measured at two time points: baseline (Day 0) and follow-up (Day 2).

Force Ratios Between ASH and IASH Tests

Evaluation of the agonist-antagonist strength ratios between ASH (extension) and IASH (flexion) tests across three adduction angles (180º, 135º, 90º).

Time frame: Measured at two time points: baseline (Day 0) and follow-up (Day 2).

Comparison of Shoulder Strength Between Preferred and Non-Preferred Breathing Sides

Analysis of differences in isometric shoulder strength between the preferred and non-preferred breathing sides in ASH and IASH tests across three adduction angles.