Thanks again, I'll take a look at the advice you have given me and try the stretches, also looking into visiting a physio this week

With regards to the injury. I was using the assisted pull up machine and set the weight to half my body weight (80kg) to try and ease into them. I was using a wide grip and the bar was in front of my head. It is the 1st time Ive really tried to do this exercise.

Thanks

Mark