Snoring can also be influenced by nasal congestion and could be made worse by the swelling of upper body tissues that occurs in microgravity as one's fluids redistribute themselves in the absence of gravity. (This is why those breathe-right strips actually do sometimes work to stop snoring; they widen the airways a bit. Mainly this just helps the person not mouth-breathe.)<br /><br />I have several champion snorers in my family; I have heard them snore sitting up and lying down. I don't think gravity has much of an affect on it for them; it probably depends on exactly why the person is snoring. <div class="Discussion_UserSignature"> <p> </p><p><font color="#666699"><em>"People assume that time is a strict progression of cause to effect, but actually from a non-linear, non-subjective viewpoint it's more like a big ball of wibbly wobbly . . . timey wimey . . . stuff."</em> -- The Tenth Doctor, "Blink"</font></p> </div>