We’re all familiar with the expression, “I must have slept wrong.” Who hasn’t found themselves second-guessing their sleeping position after waking up with a crick in their neck or kink in their back?

While many of us are in the habit of dozing off in whatever position our body settles in, choosing the right sleeping position is actually much more complicated.mThe distinctions between sleeping positions may seem negligible, but they can actually mean the difference between a good night’s rest and a night spent tossing and turning.

For example, sleeping on your left side is best during pregnancy, as it increases circulation to the fetus and prevents the uterus from pressing against the liver; sleeping on your back is good for reducing acid reflux, but bad for sleep apnea sufferers.

Check out Sensorgel infographic below to find out which sleeping position is best for you.