👉Move With Me Live👈 The biomechanics SCAPULOHUMERAL RHYTHM TRUTH RATIO: 2:1 humeroscapular ratio Setiap 30° humerus elevation = 10° scapula upward rotation Full 180° arms overhead = ~60° scapula upward rotation UPPER TRAP ROLE: Normal upper trap activation = REQUIRED untuk overhead Excessive upper trap = problem (chronic tension pattern) Beda antara "aktivasi normal" vs "over-activation" CONSEQUENCES OF FORCING SHOULDER DOWN: Restricts scapular rotation Create