When I do L-Pull ups, I feel like I´m getting blocked in the back of my shoulders, initiating the movement from fully extended arms. I have trouble lowering into a full dead hang as well. This is only a problem when I flex the hip and put my feet out in front as in the L-Pull up. I never have this problem doing regular pull ups and I figure it´s not strength related as I can do weighted pull ups with a descent amount of weight.
My shoulder mobility is generally pretty good, except I might be missing some internal rotation and have been told my posterior capsule might be a bit tight. I also have a fairly stiff thoracic spine.
So I´m wondering if anyone know of specific stretches or mobility drills that might be helpful?
Thanks in advance