New research debunks the notion that chronotype is a binary choice between "morning people" and "night owls." It also shows that a substantial number of people, if not an outright majority, are not energetic in the morning. It's time to end the tyranny of early birds.
Night owls, we all know one, or we are ourselves. Humans show variable preference in diurnal phase – meaning late risers. These individuals could be diagnosed with delayed sleep phase disorder (DSPD) which accounts for nearly 10 percent of all patients seen in sleep clinics.