Læknablaðið - 15.02.2011, Blaðsíða 17

FRÆÐIGREINAR
RANNSÓKN
11. Guinhouya CB, Hubert H, Soubrier S, Vilhelm C, Lemdani
M, Durocher A. Moderate-to-vigorous physical activity
among children: discrepancies in accelerometry-based cut-
off points. Obesity (Silver Spring) 2006; 14: 774-7.
12. Riddoch CJ, Mattocks C, Deere K, et al. Objective
measurement of levels and pattems of physical activity. Arch
Dis Child 2007; 92: 963-9.
13. Dencker M, Thorsson O, Karlsson MK, et al. Daily physical
activity in Swedish children aged 8-11 years. Scand J Med Sci
Sports 2006; 16: 252-7.
14. Faghópur Lýðheilsustöðvar um ráðleggingar um hreyfingu.
Ráðleggingar um hreyfingu. Bæklingur. Lýðheilsustöð,
Reykjavík 2008.
15. Guinhouya CB, Lemdani M, Vilhelm C, Durocher A, Hubert
H. Actigraph-defined moderate-to-vigorous physical activity
cut-off points among children: statistical and biobehavioural
relevance. Acta Paediatr 2009; 9: 708-14.
16. Treuth MS, Schmitz K, Catellier DJ, et al. Defining
accelerometer thresholds for activity intensities in adolescent
girls. Med Sci Sports Exerc 2004; 36:1259-66.
17. Puyau MR, Adolph AL, Vohra FA, Butte NF. Validation and
calibration of physical activity monitors in children. Obes
Res 2002; 10:150-7.
18. Magnusson KT, Sveinsson T, Amgrimsson SA, Johannsson
E. Predictors of fatness and physical fitness in nine-year-old
Icelandic school children. Int J Pediatr Obes 2008; 3: 217-25.
19. Riddoch CJ, Bo Andersen L, Wedderkopp N, et al. Physical
activity levels and pattems of 9- and 15-yr-old European
children. Med Sci Sports Exerc 2004; 36: 86-92.
20. Cole TJ, Bellizzi MC, Flegal KM, Dietz WH. Establishing
a standard definition for child overweight and obesity
worldwide: intemational survey. BMJ 2000; 320:1240-3.
21. Mattocks C, Leary S, Ness A, et al. Calibration of an
accelerometer during free-living activities in children. Int J
Pediatr Obes 2007; 2: 218-26.
22. Schofield WN. Predicting basal metabolic rate, new
standards and review of previous work. Hum Nutr Clin Nutr
1985; 39 Suppl 1:5-41.
23. Nader PR, Bradley RH, Houts RM, McRitchie SL, O'Brien
M. Moderate-to-vigorous physical activity from ages 9 to 15
years. JAMA 2008; 30: 295-305.
24. Trost SG, Pate RR, Sallis JF, et al. Age and gender differences
in objectively measured physical activity in youth. Med Sci
Sports Exerc 2002; 34: 350-5.
25. Mark AE, Janssen I. Influence of bouts of physical activity on
overweight in youth. Am J Prev Med 2009; 36: 416-21.
26. Intemationl Obesity Task Force. Childhood obesity report.
2009; www.iotf.org/childhoodobesity.asp 23. nóvember 2009
27. Welk GJ, Corbin CB, Dale D. Measurement issues in the
assessment of physical activity in children. Res Q Exerc Sport
2000; 71(2 Suppl): S59-73.
28. Fulton JE, Dai S, Steffen LM, Grunbaum JA, Shah SM,
Labarthe DR. Physical activity, energy intake, sedentary
behavior, and adiposity in youth. Am J Prev Med 2009; 37(1
Suppl): S40-9.
29. Powell KE, Roberts AM, Ross JG, Phillips MA, Ujamaa DA,
Zhou M. Low physical fitness among fifth- and seventh-
grade students, Georgia, 2006. Am J Prev Med 2009; 36: 304-
10.
30. Kolle E, Steene-Johannessen J, Andersen LB, Anderssen SA.
Seasonal variation in objectively assessed physical activity
among children and adolescents in Norway: a cross-sectional
study. Int J Behav Nutr Phys Act 2009; 6: 36.
Physical activity of 9 and 15 year old lcelandic children - Public health objectives
and relations of physical activity to gender, age, anthropometry and area of living
Objective: The main objective of the study was to assess
to what degree nine and fifteen year old lcelandic children
followed the national physical activity (PA) guidelines for
children set forth by the lcelandic Public Health Institute,
which recommend no less than 60 minutes of moderate-
to-vigorous physical activity a day (MVPA).
Material and methods: The study was conducted
between September 2003 and January 2004 at eighteen
randomly selected schools in the capital area of Reykjavik
and towns and rural areas in the northeast. All nine years
old (N=662) and fifteen years old (N=661) students were
offered to participate. Half of the children were randomly
chosen to partake in the PA part of the study where 176
nine-year-old and 162 fifteen-year-old children yielded
usable data. We measured participants’ height, weight
and skinfold thickness and their PA by ActiGraph™ with
respect to moderate-to-vigorous intensity (defined as
counts >3400 cpm) and average volume.
Results: Only 5% of 9-year-old and 9% of 15 year-old
students followed the recommended PA guidelines of at
least 60 minutes a day of MVPA. MVPA was positively
associated with sex (being a boy) and age, but negatively
associated with skinfold thickness. Those living in the
capital area of Reykjavik rather than in smaller towns and
rural areas were likelier to accrue more minutes of MVPA
per day.
Conclusion: The results highlight the importance of
developing PA interventions targeting children of school
age. It is important to research and evaluate different ways
as to how these interventions should best be conducted.
Magnusson K, Arngrimsson SA, Sveinsson Th, Johannsson E.
Physical activity of 9 and 15 year old lcelandic children - Public health objectives and relations of physical activity to gender,
age, anthropometry and area of living. Icel Med J 2011; 97: 75-81
Key words: physical activity, children, body composition, accelerometers.
Correspondence: Kristján Þór Magnússon, ktm@hi.is
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Barst: 21. janúar 2010, - samþykkt til birtingar: 5. desember 2010
Hagsmunatengsl: Engin
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