Poor tongue posture can also cause obstructive sleep apnea where your tongue relaxes too much in your sleep and collapses, closing off your airway and causing y

Poor tongue posture can also cause obstructive sleep apnea where your tongue relaxes too much in your sleep and collapses, closing off your airway and causing you to "wake up" but not in a conscious way 5+ times per hour. The end result is that you wake up feeling extremely tired but do not remember feeling restless at all during the night.