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Sleeping habits of adolescents in relation to their physical activity and exercise output: results from the ELSPAC study

Máchal, J; Zlámal, F; Kukla, L; Švancara, J; Pikhart, H; Bienertová-Vašků, J; (2018) Sleeping habits of adolescents in relation to their physical activity and exercise output: results from the ELSPAC study. Journal of Epidemiology and Community Health , 72 (12) pp. 1141-1146. 10.1136/jech-2018-210970. Green open access

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Abstract

BACKGROUND: Little is known about the effects of physical activity and fitness on sleep timing parameters in adolescence. METHODS: We investigated the development of sleep timing between age 8 and 15 and its association with physical fitness at age 15 in 787 adolescents (408 males, 379 females). Physical fitness was measured using the physical work capacity (PWC) protocol. Information on sport activity was collected at ages 11 and 15. Finally, the contribution of other covariates (sex, body mass index (BMI), parental education and occupational skill level) to the association between sleep parameters and physical fitness was evaluated. The correlation of BMI and physical fitness was assessed separately. RESULTS: Mild correlation of sleep duration at ages 8 and 15 was observed (r=0.08-0.16). Higher sport activity participation and physical fitness were found to be mildly associated with delayed bedtime and reduced sleep duration; the association with bedtime was significant after adjustment for all covariates. Sport activity at age 11 was not associated with sleep timing at age 15. Interestingly, higher BMI was linked to delayed bedtime and higher physical fitness. CONCLUSION: Our findings do not support existing hypotheses suggesting the association of low physical activity and fitness with shorter sleep duration and high BMI in a generally non-obese adolescent population without severe sleep restriction.

Type: Article
Title: Sleeping habits of adolescents in relation to their physical activity and exercise output: results from the ELSPAC study
Location: England
Open access status: An open access version is available from UCL Discovery
DOI: 10.1136/jech-2018-210970
Publisher version: http://dx.doi.org/10.1136/jech-2018-210970
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: adolescents, exercise test, physical activity, sleep
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences > Institute of Epidemiology and Health
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences > Institute of Epidemiology and Health > Epidemiology and Public Health
URI: https://discovery.ucl.ac.uk/id/eprint/10054473
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