'My Mind Seems to Wake Up When It Is Time to Sleep!'
People with delayed sleep phase feel sleepy much later in the night and need to sleep in to get sufficient sleep. As a result, they often suffer the effects of chronic lack of sleep, since most people have commitmernts to fulfill -- such as being in school or at work -- in the morning.
mind wake time sleep people delay sleep phase feel sleepy later night need sleep sufficient sleep result suffer effect chronic lack sleep people commitmernt fulfill school work morning