Israeli startup Daily Backup has developed the CogniSpine – a semi-inflatable mattress that returns your spine to its natural curvature when lying on it in a prone position. It also stimulates the vagus nerve, which regulates heart rate, etc., switching it into “relaxed mode”.
https://nocamels.com/2022/12/relax-lying-face-down-could-be-the-best-stress-buster/