When my I was going through therapy to regain the use of my arm and hand back in 2000 due to NO feeling in it from the"cumulative" trauma. The orthopedic put a sling on me.
When I went in to PT 2 days later she was shocked and walked right over to his office and scolded about slinging and a lesson on anatomy. That my arm had to HAVE continued circulation. MY HAND AND FINGERS HAD STARTED TO TURN BLUISH. She immediately took it off and got the circulation flowing.

It has taken me many years to find the correct therapist. I can now swing my arm down at my side of a short time instead of protecting it.

LAY DOWN ON THE FLOOR TO RELEASE THE GRAVITY FROM THE MUSCLE AND CIRCULATION SYSTEM. Do some of your Butler exercises to get the flow of the circulation fed through to the muscles and loosen up the tight traps and muscles. Your elbow has been bent for 2 hours. LAY DOWN AND OPEN UP THE BRACHIAL PLEXUS AND LIGHTLY START STRENGTHENING YOUR TAPS which hold up your shoulder girdle.