Originally Posted by Talvi
I felt that if I had more flexible/strong shoulders the angle would be less i.e my upper arms would be further above my head but for me I could feel that trying to reduce the 90' angle of upper arm to bodyline introduced the stress.
I've only met 1 swimmer in all of my coaching who could not catch the water in teh way TI teaches due to shoulder pain. I have met scores of them who claimed they could not, until I showed them how to move their body.
The problem with laying on your back on the bed, while creative and will certainly get you a good start, is that it nearly forces you to bring the upper arm down with the action you describe. At least standing up, you can use body rotation to allow the shoulder to get into a friendlier position without pain.