The rhomboids are the muscle that are situated between the scapula(shoulder blade) and the spine. They are often weak and cause some pain in the region where they are situated. With the strengthen of those muscles, and the strech of the pec, the pain should go down.Voici comment prodéder à l'exercice/Here how you do the exercice :
-With your arms, form these letters: Y, U, T and L.Be sure that your scapula get closer together while you are doing the movement, just like the picture below:
Hold the position for 5 seconds. Repeat 8 times(to start) doing 3 series. Do those exercices 2 or 3 times a day.