Trunk rotates away to increase the stretch
Lumbar rotation substitutes for true pec lengthening.
Overactive muscles
ObliquesLatissimus dorsi
Corrective work
Foam RollPectorals↗Foam RollThoracic spine↗StretchDoorway pec stretch↗Lumbar rotation substitutes for true pec lengthening.
SCM and scalenes tighten as the chest opens.