Here are the TOP 3 arm paths that quietly lead to shoulder impingement and pain: ❌ Late external rotation When rotation happens too late, the rotator cuff and elbow absorb excessive stress. ❌ Hyper abduction at landing Lifting the arm too high at foot strike overloads the shoulder joint at its most vulnerable moment. ❌ Arm drag / hyperangulation When the elbow lags behind the torso, the shoulder is forced to catch up under extreme load. Now the solution: ✅ The ideal arm path The arm stays in syn