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Updated: Jul 6, 2026

Measuring Neural Mechanisms Underlying Sleep-Dependent Memory Consolidation During Naps in Early Childhood
Published on: October 2, 2019
Development of sleep-wake schedules during childhood and relationship with sleep duration
Evelyne Touchette1, Valérie Mongrain, Dominique Petit
1Sleep Research Center, Sacré-Coeur Hospital, 5400 Gouin West Blvd, Montreal, QC H4J 1C5, Canada.
Insights
Children
Area of Science:
- Pediatric Sleep Medicine
- Child Development
- Chronobiology
Background:
- Understanding children's sleep patterns is crucial for their development.
- Weekday and weekend sleep schedules can differ significantly.
- The impact of these differences on sleep duration requires investigation.
Purpose of the Study:
- To longitudinally track weekday and weekend sleep schedules in children aged 4-6 years.
- To analyze the relationship between sleep-wake timing and nocturnal sleep duration.
- To explore any potential association with birth season.
Main Methods:
- Longitudinal survey design utilizing home interviews and questionnaires.
- Data collected from 1112 children at ages 4, 5, and 6 years.
- Mothers reported habitual bedtimes and wake times; sleep duration calculated.
Main Results:
- Bedtimes on weekends progressively shifted later compared to weekdays.
- Most children experienced shorter sleep duration on weekends versus weekdays.
- No significant correlation was found between birth season and sleep-wake schedules.
Conclusions:
- Weekend sleep displacement begins early in childhood.
- Later weekend bedtimes are linked to reduced overall sleep duration in children.
- These findings highlight the importance of consistent sleep schedules for adequate rest.
Objectives:
To present a longitudinal overview of the sleep schedules during weekdays and the weekend in a large sample of children and to examine the sleep-wake schedules in relation to nocturnal sleep duration and birth season.
Design:
Longitudinal survey design.
Setting:
Data were collected by home interviews and questionnaires.
Participants:
Data for sleep schedules at the ages of 4, 5, and 6 years on weekdays were obtained for 1112 children. Data for bedtimes on the weekend were available for 1094 children, and data for wake times on the weekend were available for 1083 children.
Outcome Measures:
Habitual bedtimes and wake times during weekdays and the weekend were reported by the mothers at the 3 ages. Nighttime sleep duration was calculated from bedtime to wake time. Birth characteristics came from medical records.
Results:
As children grow up, we found later bedtimes on the weekend for a given bedtime on weekdays. Interestingly, most children slept less during the weekend compared with weekdays. No significant difference (P > .10 for all) was found in the seasonal distribution of births in any of the sleep-wake schedules.
Conclusions:
Despite a lack of a strong preference for sleep timing during childhood, the displacement of bedtime toward later hours during the weekend starts early in life. More important, sleep-wake patterns are associated with sleep duration and later bedtimes on the weekend seem to shorten sleep duration in most children.
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