First refer to Myth #8 about short beds.
This week, we’ll deal with the sitting up part. This myth (which, I blush to disclose, I remember spreading back in the ’70s), often cites bad air as the reason for the belief that sleeping sitting up was healthier than lying down. Supposedly, bad air was heavier than fresh air, so sleeping with your head elevated kept your nose that much farther above the bad air.
Robin Kipps, supervisor of the Pasteur & Galt Apothecary in Williamsburg and an expert in early American medical issues, spent hours searching through volumes of 17th-, 18th-, and 19th-century medical books before reporting, “There isn’t any evidence that [they thought] bad air was heavier or that they slept with their heads raised due to bad air. There is evidence that people slept with their heads elevated for medical reasons. If patients had an upper respiratory condition such as asthma or were recovering from a specific type of surgery, it was suggested that they sleep with their head elevated. Note it is not sitting up sleeping, it merely says with head raised.” Sharon Cotner, senior medical history interpreter at the Apothecary who has studied medical history for thirty years, found published medical information of the period suggested that “under normal conditions, people should sleep on their side, with knees bent and head raised. Not sitting up.”