Hey guys, I'm looking for some advice on this imbalance. I'm 18 years old and after years of playing cello, I have the imbalance you can see in the picture: at resting posture, my entire left shoulder is pulled up and forward. It sits above my right, which means when I put on a backpack I feel really imbalanced and I soon get pain that freezes up my left shoulder. Also the imbalance is messing with me and holding me back as I have started to try some physical training. Does anyone have experience dealing with an imbalance like this?