Prax. Kinderpsychol. Kinderpsychiat. 68: 128 – 145 (2019), ISSN: 0032-7034 (print), 2196-8225 (online) © Vandenhoeck & Ruprecht GmbH & Co. KG, Göttingen 2019 https://doi.org/10.13109/prkk.2019.68.2.128 Schlaf und Befndlichkeit bei Kindern und Jugendlichen – ein narratives Review Serge Brand, Sakari Lemola, Torsten Mikoteit, Edith Holsboer-Trachsler, Nadeem Kalak, Dena Sadeghi Bahmani, Uwe Pühse, Sebastian Ludyga und Markus Gerber Summary Sleep and Psychological Functioning of Children and Adolescents – a Narrative Review Children and adolescents need sufcient and restoring sleep to improve their cognitive, emo- tional, social and behavioral performance. Te present narrative review describes the associa- tions between children’s and adolescents’ sleep patterns and a broad variety of topics; these top- ics were chosen at the authors’ discretion and does not claim to be exhaustive. Afer a short introduction, we describe the associations between (adolescent) children’s sleep in tight relation to the family functioning. Specifcally, (adolescent) children’s sleep and psychological function- ing appears to be related to mothers’ sleep and psychological functioning. Findings from longi- tudinal studies are reported, which underline that poor sleep at childhood increases the risk of poor sleep and somatic and psychological health issues later in life. Excessive screen time in the evening increases the risk of shorter sleep duration and increased daytime sleepiness; on the fip side, it also appears the excessive screen time might be a coping strategy to deal with symptoms of anxiety; further, using social media in the evening seems to be associated with the adoles- cents’ need to stay in touch with their peers. While physical inactivity and sedentary behavior is a serious health concern, in children and adolescents, regular physical activity is associated with improved subjective and objective sleep and a broad variety of psychological health outcomes. Further selective topics are: While children and adolescents with repaired clef did not show dis- advantages in their sleep and psychological functioning compared to their counterparts without clefs, at the age of seven to nine years, very preterm children show unfavorable sleep patterns and psychological functioning, compared to typically developing children. Prax. Kinderpsychol. Kinderpsychiat. 68/2019, 128-145 Keywords parents – family functioning – physical activity – peers – screen time Zusammenfassung Kinder und Jugendliche brauchen genügend und erholsamen Schlaf. Denken, Fühlen, Handeln und soziale Interaktionen gelingen einfacher, präziser und schneller, je erholsamer ein Kind und Jugendlicher schläf. Die vorliegende narrative Übersichtsarbeit beschreibt diese Zusammen- hänge genauer, ohne Anspruch auf Vollständigkeit zu erheben. Entsprechend erfolgte die Aus-