I enjoy doing capoeira, but one of the escape movements is giving me a lot of trouble. In the Queda de Quatro, where one leans backwards into a crab walk position to avoid a blow, I can't seem to do it in a way where my shoulders don't ache with the impact, at least with proper technique and hand positioning. Hands pointed forward, I just can't get my shoulders to countenance the movement. I have a similar problem doing the calisthenics exercise where you put your hands behind you while in a seated position and lift your buttocks in the air and flatten your body horizontally. Based on the feeling of the motion, I almost feel like my arms are too short in proportion to my body, but the strain is in the shoulders, in particular around the front of the joint.
I can do it successfully if I turn my hands so that they face backwards, but my mestre has told me that doing that makes it much more likely that I'll get my elbows broken by either the impact or a strike I don't dodge.
If there's any additional info I can give to help others help me with this, please tell me and I will elaborate on my question.