Researchers in Japan recently conducted a study of nursing - home residents who suffered from insomnia, and they found that the poor quality of the subjects ’ sleep was related to their limited daily exposure to environmental light.
Para peneliti di Jepang baru - baru ini mengadakan sebuah penelitian atas para penghuni panti werda yang menderita insomnia, dan mereka mendapati bahwa kurang tidur berkaitan dengan kurangnya terkena sinar matahari.