Elbow bends during the stretch
The arm should stay as straight as possible; bending reduces the bicep long head stretch.
Overactive muscles
Biceps brachiiAnterior deltoid
Corrective work
Foam RollPectorals↗StretchDoorway pec stretch↗The arm should stay as straight as possible; bending reduces the bicep long head stretch.
The rotation should come from the shoulder and thorax; leaning sideways targets the lat.