Shoulders shrug at the peak hold
Upper traps dominate under the sustained retraction hold.
Overactive muscles
Upper trapeziusLevator scapulae
Corrective work
Foam RollUpper traps↗StretchLevator scapulae stretch↗Upper traps dominate under the sustained retraction hold.
Erectors assist the row; the prone isolation of the mid-back is lost.