How do I improve my technique to avoid Swimmer’s Shoulder?

Swimming coach Cassie Patten answers a reader question about how to improve their swim technique to avoid further shoulder pain

“I am a social swimmer and I wanted to know what your opinion was on technique work. I don’t want to be fast as I’m quite happy swimming around the lake at my own speed but I do often get drawn into the odd YouTube video to see if what I’m doing is correct or not.