In any case, it is certain that the number of complaints related to sleep problems has increased in recent years. This is due to two phenomena. First, in today's society, people want to control their sleep, it must be perfect to optimize their efficiency the next day. As with food or running, sleep (as well as waking phases) is constantly measured. How long and how should you sleep? This question can become a real obsession. However, the more we try to control our sleep, the more it escapes us. Focusing on sleep disturbs it and leads to various health and attention problems.