Most people consider themselves either a night person or a morning person. What if you're sleepy all day long?
A new study published in the journal Personality and Individual Differences found that about a quarter of its sample felt energized all day and a quarter felt lethargic regardless of the time of day. Dr. Eric Dyken, a sleep expert at the University of Iowa, says these circadian preferences aren't set in stone.
"Even throughout one's lifetime that can change. It's normal for young adolescents to want to stay up later because their circadian biological clock is set a little bit differently so that young adolescents tend to stay up later and sleep in later. Whereas you get to be my age, you tend to go to bed earlier and get up earlier, a little more lark-ish."
On this hour of River to River, Dr. Dyken talks with host Ben Kieffer about new developments in sleep science and answers listener questions about their sleep problems.