Idzikowski — who did a study on sleeping positions and what they said about someone’s personality traits and health involving 1,000 participants — found that the fetal position was the most common, amounting to 41% of the study’s subjects, per BBC. The position was also most preferred by women.
Sleeping bunched up like a ball was linked with a tough exterior but sensitive heart. If you prefer this sleeping position yourself, you might be perceived as shy by others when they first meet you, but you tend to relax with time.
Anxious personality trait aside, did you know that there are many surprising ways your sleep position can impact your health? Side sleepers, in general, are said to be better bed partners, mainly owing to the fact that there’s less chance of them snoring, per Healthline. There are also many health benefits to side sleeping like improved waste clearance in the brain, maintaining a natural alignment of your spine, and better circulation for a baby in a pregnant mother (via WebMD). However, not everything about the fetal position is good for you. In fact, curling up in a ball can increase your chances of waking up sore the next morning. You can also be putting undue strain on your lungs and diaphragm.