@arslibertatis and beds. Shelves are probably pretty benign 
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@Seal_Dealer I don’t have a full answer—it’s a “possible project” because it needs serious science and engineering which no one has yet done
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@awbery and I sleep on a thin futon (Japanese style) with a thin layer of latex foam on top. - 1 more reply
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@msutherl I don’t know whether there are any controlled studies. There’s a subculture of people figuring this stuff out from various angles, -
@msutherl but doesn’t seem to be a lot of crossover into “sleep medicine” community who could get the funding for proper studies. - 1 more reply
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@Seal_Dealer We’ve just moved into an unfurnished place for the first time in a very long time, so are starting to put theories to test.
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@msutherl Have you tried a softer mattress? I do expect there are individual variations, rather than a single optimal solution. -
@msutherl Sleeping is also a physical skill that can be learned (and is not taught, of course!). - 1 more reply
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