excercises for the rounded shoulder.?

im a 20 year old man, i love to keep fit and go to the gym as often as possible. being employed at a call center, I have noticed my posture greatly deteriorate ( where i may sit infront of a desk for as long as 10 hrs). I have been keeping proper form all this time while emphasizing excercises that strenghthen my core and shoulders, but i am getting the idea that my workouts may not be efficient enough.

Dancers are known for having great posture and sholders back – It is know as Dancers Form. This is gained by the way the hold themselves and their partner. When your sholders curve forward and drop, it does impede your lung capacity and thus your oxygen levels because it is impossible to breath deeply using the diaphragm when “slumped”. Women struggle with this in particular. I had a sister in-law who did this so severly under stress that she had to go to physical therapy and use meds to control the pain

One thing Men who ballroom dance do to create this dance frame is take a broom stick and place it behind their neck and then place their arms to rest on top and hold onto the stick. The chest is immediately opened up and lifted. This is a great stretch.

Another is to place your elbow and fore arm against the wall pointing up with your hand flat against the wall . With your body perpendicular to that same wall. No step forward with you foot closest to the wall and move your body forward. You will feel a stretch in your sholder muscle and chest area. Do this and hold for a count of 10 several times. It is a great stretch for someone like me who is infront of a computer all day.