Rhomboid(red) Lavator scapulae(blue) |
Rectus abdominis (berry muscle) <---> Elector spinae (aside of spine)
Rhomboid (the red part on the right fig.) <---> Serratus (another name is Boxer muscle, red part on the bottom fig.)
Pectoralis minor ( the blue part on the bottom fig.) <---> Lavator scapulae (it connects cervical and shoulder blade, blue part of the right fig.)
Serratus(red), Pectoralis minor(blue) |
The shoulder blade will be slanted when the contraction is different between the muscle and the antagonist, then range of the motion might be changed or feels pain at a point of a movement.
It is not only important that softening the muscle tightness, be conscious about the antagonist and how to train the both muscles evenly at the gym, yoga, or in any exercises, also.