Shoulders shrug to initiate
Upper traps lift the dumbbells; mid-back never loads.
Overactive muscles
Upper trapeziusLevator scapulae
Corrective work
Foam RollUpper traps↗StretchLevator scapulae stretch↗Upper traps lift the dumbbells; mid-back never loads.
Erectors extend the spine to assist; mid-back underloaded.