i dont remember a very expensive bed that does this, but i am aware f some beds that are not soo expensive that surely do help, through support and even weight distribution - the expnsive version being Tempur memory foam, nd the inexpensive version being visco - i got mine at http://www.viscomattress4you.co.uk/vmchk/Ortho-Flex/Ortho-Flex-Mattress-with-...