| Effect of Morning School Schedule on Sleep and Anthropometric Variables in Adolescents: A Follow-Up Study. | |
| | |
MedLine Citation:
|
PMID: 21867369 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
The aim of this study was to assess whether the shift from afternoon to morning classes reduces the duration of sleep and whether this reduction has any relation to body fat measurements. This is a follow-up study in which students (n = 379), 12.4 (SD ± 0.7) yrs old, were evaluated before and after the school schedule shift, with a 1-yr interval between the first and second data collections. Adolescents were divided into two groups: an afternoon-morning group (students who shifted from afternoon to morning classes) and an afternoon-afternoon group (students who remained in afternoon classes). The morning schedule of classes lasted from 07:30 and 12:00 h, and the afternoon schedule of classes lasted from 13:00 and 17:30 h. Self-reported bedtime, wake-up time, and time-in-bed were obtained. Body mass index, waist circumference, and body fat percentage were obtained by direct measures. The results showed a reduction of time-in-bed during weekdays for those students who changed to the morning session (p < .001). Analysis of covariance (ANCOVA) for repeated measures of anthropometric differences between afternoon-afternoon and afternoon-morning groups showed no effect of the school schedule change on weight gain. In conclusion, the time-in-bed reduction in the period analyzed cannot be considered to be a mediating factor to modifications in overweight anthropometric indicators. (Author correspondence: michelleb_fisio@yahoo.com.br ). |
| | |
Authors:
|
Michelle Brandalize; Erico Felden Pereira; Neiva Leite; Geraldo Lorenzi Filho; Fernando Mazzilli Louzada |
Related Documents
:
|
5782259 - Oral history and the medical librarian. 10244399 - The pay-for-performance dilemma. 21941009 - Hydration status in adolescent judo athletes before and after training in the heat. 12828809 - Thought-action fusion and schizotypy in undergraduate students. 18702399 - Proteus rebound: reconsidering the "torture of nature". 10826169 - Effect of nymphal diet on adult predation behavior in orius majusculus (heteroptera: an... 19842439 - Detection of phenylketonuria by the newborn screening program in thailand. 7362439 - Sex education: evaluation and recommendations for future study. 8723949 - Stapedectomy in residency training. |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-8-25 |
Journal Detail:
|
Title: Chronobiology international Volume: - ISSN: 1525-6073 ISO Abbreviation: - Publication Date: 2011 Aug |
Date Detail:
|
Created Date: 2011-8-26 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8501362 Medline TA: Chronobiol Int Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
|
Department of Physical Therapy, Faculdade Guairacá, Guarapuava, Paraná , Brazil. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Measurements of light at night (LAN) for a sample of female school teachers.
Next Document: Direction of causality between body fat and insulin resistance in children - a longitudinal study (E...