I looked into this question a number of years ago, as a side-sleeper wondering if and whether I should try to sleep on my back, which would simplify things considerably. I couldn’t find anything worth citing, and concluded either I was looking under the wrong keywords or the desired research doesn’t exist. Since my own efforts to try to switch failed, I gave up and bought a real body pillow, which seemed to help.
I looked into this question a number of years ago, as a side-sleeper wondering if and whether I should try to sleep on my back, which would simplify things considerably. I couldn’t find anything worth citing, and concluded either I was looking under the wrong keywords or the desired research doesn’t exist. Since my own efforts to try to switch failed, I gave up and bought a real body pillow, which seemed to help.