Safe self-observation

Hand-behind-back reach comparison

Track internal rotation (often restricted in frozen shoulder).

ℹ Additional explanation

Purpose	Track internal rotation (often restricted in frozen shoulder).
Procedure	Reach each hand up behind your back as if fastening a bra or tucking in a shirt. Note the highest point of the spine your thumb reaches on each side.
What you may notice	Clear one-sided loss, together with lost outward rotation, matches a capsular pattern.
Interpretation	A progress marker, not a diagnosis.

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