School-based obesity prevention in Norway: Correlates of weight statues and intervention effects on physical activity and body composition: The Health in Adolescents Study (HEIA)
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Prevention of childhood obesity is an international public health priority given the significant impact of obesity on short- and long-term functioning, health and wellbeing. Although recommended in several recent reviews, school-based obesity prevention interventions targeting physical activity and diet have been tested with mixed results. The overall aim of the HEalth in Adolescents (HEIA) study was to design, implement and evaluate a comprehensive intervention program to promote a healthy weight development among young adolescents (11 to 13 year olds). This thesis investigates correlates of weight status and effects of the HEIA intervention program on physical activity and body composition. Furthermore, the validity of the physical activity assessment tool, the ActiGraph accelerometer, was investigated in a separate study.Paper I: Grydeland M, Bergh IH, Bjelland M, Lien N, Andersen LF, Ommundsen Y, Klepp KI, Anderssen SA. Correlates of weight status among Norwegian 11-year-olds: The HEIA study. BMC Public Health. 2012 Dec 6;12:1053. doi: 10.1186/1471-2458-12-1053.Paper II: Grydeland M, Bergh IH, Bjelland M, Lien N, Andersen LF, Ommundsen Y, Klepp KI, Anderssen SA. Intervention effects on physical activity: the HEIA study - a cluster randomized controlled trial. Int J Behav Nutr Phys Act. 2013 Feb 5;10:17. doi: 10.1186/1479-5868-10-17.Paper III: Grydeland M, Bjelland M, Anderssen SA, Klepp K-I, Bergh IH, Andersen LF, Ommundsen Y, Lien N. Effects of a 20-month cluster randomized controlled school-based intervention trial on BMI of school-aged boys and girls: the HEIA study. Br J Sports Med 2013 Published Online First: (290413) doi: 10.1136/bjsports-2013-092284.Paper IV: Tatt ut av filen i Brage p.g.a. copyright-restriksjoner. / Not in the file in Brage because of copyright issues.
Avhandling (doktorgrad) - Norges idrettshøgskole, 2013