The optimal sleeping position for promoting healthy blood circulation throughout the body—particularly returning blood from the lower extremities—is sleeping on your back (supine position) with your legs elevated slightly on pillows so your feet rest above the level of your heart. Alternatively, sleeping on your left side is widely recommended by medical experts because it relieves pressure off the inferior vena cava (the large vein returning blood to the heart from the lower body), thereby optimizing overall cardiac output, maternal-fetal circulation during pregnancy, and general overnight cardiovascular efficiency.
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