During progressive wall angle coaching, which structure should be checked for stability before advancing to arm movements?

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In wall angle coaching, establishing a stable base for the arms starts with the scapula. When the scapula sits securely against the thorax and can move through proper patterns—upward rotation, posterior tilt, and controlled retraction—the shoulder joint has a stable platform for arm movement, promoting good alignment and reducing the risk of impingement or compensations. Checking scapular stability ensures that the arm work is built on a solid foundation rather than on unstable or distorted shoulder mechanics. The clavicle supports shoulder girdle function, but the priority here is scapular stability; the wrist and knee aren’t the primary concerns when moving into arm movements on the wall.