The full read
These recommendations line up almost word-for-word with Mayo Clinic's guidance for sleep-related low back pain (pillow between the legs when side-sleeping, under the knees when back-sleeping). A recent systematic review on sleep posture and low back pain confirms that supine and well-supported side-lying positions are linked to lower pain prevalence, unlike the prone position, which loads the lumbar region more. A meta-analysis on pillow design also confirms an effect on cervical alignment and waking symptoms. This is practical, risk-free advice that lines up well with current physiotherapy guidance — though the benefit shows up mostly for people who already deal with back or neck pain.
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