When I do the mobility part of this exercise I keep my shoulders elevated and I try to protract my shoulder blades (separate them and bring them forward). This feel unnatural to me and I feel my upper sides lock up, just beneath the arm pits, and reduces the range on how back I can pull my arms. Is that the correct way of doing this exercise?
Before I did it the way I described above, I just elevated my shoulders and I noticed that my shoulder blades wanted to move backwards and when I tried to pull my arms more backwards, I get a good range of motion. It was still hard, but it felt natural.
I aim to lift my arms all the way up and touch the ceiling and then move them up and back to touch the back wall, this is the visualisation I use to get a full extension up and back.
Thanks,
George