The “Cozy” Habit That “Over-Stretches” Your Back: Expert on Fetal Position

That “cozy” habit of curling up in a tight ball at night might be the reason for your mid-back pain. A spine specialist has warned that the tight fetal position “over-stretches” your back muscles and is one of two key postures that can harm your spine.
The expert, a chiropractor and spine alignment specialist, explained that when you “tuck their knees tightly to their chest,” it “rounds the spine too much.” This excessive C-curve, held for hours, can lead to muscle weakness, decreased flexibility, and chronic pain in the mid-back region.
The specialist also pointed out that this tightly curled posture has other negative effects. It restricts the diaphragm, which “limits deep breathing,” and it also “tightens hip flexors,” which can contribute to lower back pain and further reduce flexibility.
The other position the expert warned against was sleeping on your stomach. This posture is notorious for causing neck strain due to the forced head twist, and it also creates an unnatural arch in the lower back. The expert cautioned that both of these positions can lead to chronic pain and posture imbalances.
To protect your spine, the specialist recommends a neutral sleeping posture. The best options are lying on your back with a small pillow under your knees, or on your side with a supportive pillow between your legs. These positions maintain the spine’s natural curve, distribute weight evenly, and allow your body to fully recover overnight.