The key to a comfortable sleep is in your intestines, and the key points you need to press before going to bed to condition your intestines and brain [When you can't fall asleep even though you're tired] | Life | Toyo Keizai Online

Have you ever had such an experience that you can't sleep so much that you feel anxious that you need to sleep? In fact, the key to a good night's sleep lies in the ``gut-brain relationship,'' where the intestines and brain work closely together.