A portion of the population does not get enough sleep, and the situation has worsened over the past decade. According to Professor Damien Léger, president of the National Institute of Sleep and Vigilance (INSV) and director of the Sleep and Vigilance Center at AP-HP and Descartes-Paris V University, three factors account for this trend: longer commutes, the growing prevalence of shift work, and the development of new technologies (the Internet, messaging apps) that push back bedtime, particularly among young people. Damien Léger recommends monitoring sleep duration on a daily basis for those who are sleep-deprived and restoring the social image of sleep.