“During sleep, your brain processes information and experiences to lay down new memories, your muscles and joints recover from constant use during the day, and you produce increased amounts of growth hormone to boost cell renewal and tissue repair,” explains nutritionist and health writer Dr Sarah Brewer for Furniture Choice.

“But while you’re asleep, your voluntary muscles become paralyzed to prevent you acting out your dreams. While this aids muscle relaxation, it could lead to aches and strains if you are lying in an awkward position.”