By Shereen Lehman Preschoolers whose natural preference is for going to bed and waking up on the late side are more likely than their early-bird peers to have sleep problems, a recent study suggests. Adults and teens with a late “chronotype,” or internal “body clock,” tend to stay up later and wake up later and to have more sleep problems than others, the researchers write in the journal Sleep Medicine. “Sleep problems can start in early childhood and often persist across development.
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‘Night-owl’ preschoolers may have more sleep problems