Lay on your back
Feet on Kletterwand, ca hip hight (depending on shoulder mobility and backbending mobility)
easier: do back to wall handstand (quite far away), let your feet fall backwards on to the Kletterwand and walk them down as low as possible
Straighten the arms to come up in a bridge
Shoulders above the wrists
Ellbows straight and keep them straightend
Elevation from shoulders
Armpits to the front and slightly facing each other
Push away the wall with your feet, legs are straight, feel a stretch in the m. trapezius, sternum and front of the arms
When you feel a pinch in the shoulders the position is wrong
30-60 sec
How to do a bridge, Natalie Reckert: https://youtu.be/gWSelDIUy6k