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Sleep length in German children and adolescents

Comparing 1907 with 2006–2008

Schlafdauer bei Kindern und Jugendlichen

Ein Vergleich zwischen 1907 und 2006–2008

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Abstract

Sleep duration seems to have declined during the last century in adolescents; however, empirical evidence is scarce. To add another piece to the puzzle, data from Germany from the year 1907 have been compared with recently obtained data from the years 2006–2008. Rise times seem more or less stable during the last 100 years (with differences less than 10 min), while bed times were later a century ago, and, hence sleep length was about half an hour longer in 2006–2008 than in 1907. This is interesting, since it contradicts the decline in sleep length claimed over the last 100 years.

Zusammenfassung

Die Schlafdauer scheint innerhalb der letzten 100 Jahre bei Jugendlichen zurückgegangen zu sein, doch sind Belege hierfür kaum vorhanden. Um hierzu einen Beitrag zu leisten, wurden Daten aus dem Jahr 1907 mit jenen von 2006–2008 verglichen. Die Aufstehzeiten blieben mehr oder weniger konstant über ein Jahrhundert hinweg (weniger als 10 min Unterschied), während die Bettzeiten vor 100 Jahren später lagen, sodass Jugendliche im Vergleich heute eine halbe Stunde länger schlafen. Dies ist insofern interessant, als es der bisher vorherrschenden Meinung widerspricht.

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References

  1. Bernhard L (1907) Beitrag zur Kenntnis der Schlafverhältnisse Berliner Gemeindeschüler. Beitr Kinderf Heilerziehung. Beih Z Kinderf 39:5–13

    Google Scholar 

  2. Díaz-Morales JF, Randler C (2008) Morningness-Eveningness among German and Spanish 12-18 year old adolescents. Eur Psychol 13:214–221

    Article  Google Scholar 

  3. Dollmann J, Ridley R, Olds F, Lowe E (2007) Trends in the duration for school-day sleep among 10- to 15-year-old South Australians between 1985 and 2004. Acta Paediatr 96:1011–1014

    Article  Google Scholar 

  4. Epstein R, Chillag N, Lavie P (1998) Starting times of school: effects on daytime functioning of fifth-grade children in Israel. Sleep 21:250–256

    PubMed  CAS  Google Scholar 

  5. Ferrara M, De Gennaro L (2001) How much sleep do we need? Sleep Med Rev 5:155–179

    Article  PubMed  Google Scholar 

  6. Iglowstein I, Jenni OG, Molionari L, Largo RH (2003) Sleep duration from infancy to adolescence: reference values and generational trends. J Pediatr 111:302–307

    Article  Google Scholar 

  7. Loessl B, Valerius G, Kopasz M et al (2007) Are adolescents chronically sleep deprived? An investigation of sleep habits of adolescents in the southwest of Germany. Child Care Health Dev 34:549–556

    Article  Google Scholar 

  8. Randler C (2008) Psychometric properties of the German version of the composite scale of morningness. Biol Rhythm Res 39:151–161

    Article  Google Scholar 

  9. Randler C (2009) Validation of the full and reduced composite scale of morningness. Biol Rhythm Res 40 (in press)

  10. Randler C, Bilger S, Díaz-Morales JF (2009) Association between sleep, chronotype, parental monitoring and pubertal development in German adolescents. J Psychol (in press)

  11. Sadeh A, Gruber R, Raviv A (2003) The effects of sleep restriction and extension on school-age children: what a difference an hour makes. Child Dev 74:444–455

    Article  PubMed  Google Scholar 

  12. Schaal S, Peter M, Randler C (2009) Morningness-eveningness and physical activity in adolescents. Int J Sport Exerc Psychol (in press)

  13. Schneider AM, Randler C (2009) Daytime sleepiness during transition into daylight saving time in adolescents – are owls higher at risk? Sleep Med (in press)

  14. Strauch I, Meier B (1998) Sleep need in adolescents: a longitudinal approach. Sleep 11:378–386

    Google Scholar 

  15. Terman LM, Hocking A (1913) The sleep of school children: its distribution according to age and its relation to physical and mental efficiency. J Educ Psychol 4:138–147

    Article  Google Scholar 

  16. Tonetti L (2007) Validity of the Morningness-Eveningness questionnaire for adolescents. Sleep Hypn 9:47–51

    Google Scholar 

  17. Tynjälä J, Kannas L, Välimaa R (1993) How young Europeans sleep. Health Educ Res 8:69–80

    Article  PubMed  Google Scholar 

  18. Webb WB, Agnew HW (1975) Are we chronically sleep deprived? Bull Psychon Soc 6:47–48

    Google Scholar 

Download references

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The corresponding author states that there are no conflicts of interest.

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Randler, C. Sleep length in German children and adolescents. Somnologie 13, 89–91 (2009). https://doi.org/10.1007/s11818-009-0426-4

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  • DOI: https://doi.org/10.1007/s11818-009-0426-4

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