Everyone here is talking about RSI but the author is probably talking about a shoulder impingement due to rounded shoulders. To fix this issue you need to stren

Everyone here is talking about RSI but the author is probably talking about a shoulder impingement due to rounded shoulders. To fix this issue you need to strengthen the back, especially the infraspinatus. There's a bunch of youtube videos that can teach you how to do this. I recommend AthleanX. I had this issue for years and studied the issue. Did a bunch of band exercises, worked out at the gym, and suddenly it disappeared.