Hey guys, I am T4 complete injury and used to have really strong core muscles from water skiing, kayaking and hand cycling. I got taken out of the game somewhat by couple of injuries resulting in muscle loss and a poor sitting posture that further resulted in rounding of my shoulders. I now have an impeded bicepital tendon in the front of my left shoulder.
I am looking for suggestions on how to work out and exercise in as many ways possible to build up my core and back muscles to push my shoulders back into a better position? The kicker is, I have to isolate use of the bicep as much as possible in my left arm!!!
Any and all suggestions very much appreciated

roller