Assuming a person is totally healthy, is there any physiological reason for a person鈥檚 preferred sleeping position? My husband likes to sleep with his arm under the pillow, but if I do this, not only do I find it terribly uncomfortable but my arm goes numb within minutes! I always go to sleep on my side but wake up on my back. Why would I find going to sleep on my side more comfortable when my body obviously prefers to sleep on its back?
C. McCardle, Newcastle upon Tyne, UK