People who sleep on their left side have a higher risk of nightmares. According to reports, this may be due to increased stress on the heart in this position. daily mail.
A study published in the journal Sleep and Hypnosis found that 41% of people who sleep on their left side experience nightmares. 15% of people who prefer to sleep on their right side experience nightmares.
This may be because people who sleep on the left side have a greater workload on the heart. A 2018 study (published in the journal BioMedical Engineering OnLine) found that this posture was associated with cardiac activity characteristic of stress. It’s unlikely to cause serious problems in people who don’t have heart disease, but feeling anxious while sleeping can lead to unpleasant dreams.
Sleeping on your back can also cause unpleasant dreams, especially in people with obstructive sleep apnea. This condition is often accompanied by snoring and respiratory arrest. Lying on your back worsens symptoms and can lead to frequent awakenings, disturbing dreams, and nightmares.
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