I'm not sure if ANY sleep positions actually help. I've tried it all and none of the tips on YouTube, nor by my physical therapist helped. Sitting up was the only way I avoided waking with numb hands and fingers. I eventually began sleeping with my travel pillow around my neck. Although physical therapy has helped with managing the pain, sleeping is still very much a struggle. I still wake in the middle of the night (which keeps me up until the sun comes up) trying to get the numbness to subside.