The upper back stretch and the shoulders alignment were always a big challenge on my handstand journey. I used to do a lot of strength exercises that affected drastically my mobility. The bigger muscle groups of my chest were not in good balance with my back. One turning point in my ability to hold a handstand for a long time was to correct my shoulder alignment. This exercise was very good when I did not have the conscience of the small muscles on my back. I could not lift my arms from the wall in this position. But the contraction was already an active stretch. I felt my upper back curve stretching and the small muscles responsible to lift my arms getting stronger. One day I was able to reach far away and understand better how to create space inside the articulation of the shoulder. As a result, my handstand was not so tiring for the arms, the weight got better distributed.