Child Sleep: When Poor Sleep Changes Everything Else
Sleep plays a fundamental role in child development — memory consolidation, emotional regulation, growth, immunity. A child who doesn't sleep enough, or who has poor-quality sleep, will function below their capacities on all these fronts — often without adults or the child themselves making the connection.
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What lack of sleep produces in children
On mood and behaviour
An under-sleeping child can be irritable, emotionally unstable, and display behaviours resembling those of ADHD: agitation, difficulty staying still, impulsivity. These symptoms can disappear simply by restoring sufficient sleep. I also offer Psy Lounge, a space to explore this topic by voice with a CBT-trained AI.
On learning
The consolidation of academic learning happens primarily during sleep. A child who sleeps little retains learning less well, has more concentration difficulties, and their academic results can suffer as a result. I go deeper into this mechanism in Your Thoughts Don’t Have to Run Your Life.
On physical health
Sleep is a time of cellular repair, growth hormone secretion, and immune strengthening. Under-sleeping children are more frequently ill and may show delayed growth in severe cases.
Sleep needs by age
- 1-2 years: 11-14h (night + nap)
- 3-5 years: 10-13h
- 6-12 years: 9-12h
- 13-18 years: 8-10h
What helps
Regular bedtime routines, a cool and dark bedroom, no screens 1 hour before bed, stable bedtime even at weekends — these simple principles, applied consistently, significantly improve the quality and duration of sleep.
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Gildas Garrec, CBT Practitioner in Nantes, offers individual therapy, couples therapy, and structured therapeutic programs.
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