Peripheral bone mineral density and different intensities of physical activity in children 6-8 years old: the Copenhagen School Child Intervention study

H Hasselstrøm, K M Karlsson, S E Hansen, V Grønfeldt, K Froberg, L B Andersen

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

Udgivelsesdato: januar
OriginalsprogEngelsk
TidsskriftCalcified Tissue International
Vol/bind80
Udgave nummer1
Sider (fra-til)31-38
Antal sider7
ISSN0171-967X
DOI
StatusUdgivet - 1. jan. 2007

Fingeraftryk

Bone Density
Exercise
Forearm
Skinfold Thickness
Photon Absorptiometry
Weights and Measures

Citer dette

@article{d025bfe0eab411dc86ef000ea68e967b,
title = "Peripheral bone mineral density and different intensities of physical activity in children 6-8 years old: the Copenhagen School Child Intervention study",
abstract = "This study aimed to evaluate the association between objectively measured habitual physical activity and calcaneal and forearm bone mineral density (BMD, g/cm(2)), one mechanically more loaded and one less loaded skeletal region, in children aged 6-8 years. BMD was measured in 297 boys and 265 girls by peripheral dual-energy X-ray absorptiometry in the forearm and calcaneus. An accelerometer registered the level of physical activity during 4 days (2 weekdays and the weekend). Weight, height, and skinfold thickness were measured. In order to establish thresholds (count . min(-1)) for bone-stimulating physical activity, we evaluated different definitions of vigorous physical activity. The boys had 3.2{\%} higher distal forearm bone mineral content (BMC, P < 0.001) and 4.5{\%} higher distal forearm BMD (P < 0.001) than the girls. They also carried out 9.7{\%} more daily physical activity and spent 14.6-19.0{\%} more time in vigorous physical activity (all P < 0.05) compared to the girls. In contrast, the girls had 3.8{\%} higher calcaneal BMC (P < 0.01) and 2.5{\%} higher calcaneal BMD (P < 0.05) than the boys. Both calcaneal and forearm BMD were significantly related to total time of daily physical activity as well as with intense physical activity above all the chosen cut-off points (all P < 0.05). The beta value for mean count . min(-1) physical activity was significantly lower than that for all the chosen cut-off points of vigorous activity both for calcaneal and distal forearm BMD. This study suggests that both habitual daily physical activity and amount of vigorous physical activity in children aged 6-8 years are associated with appendicular BMD.",
keywords = "Absorptiometry, Photon, Bone Density, Calcaneus, Child, Cross-Sectional Studies, Denmark, Female, Humans, Linear Models, Male, Motor Activity, Radius, Sex Characteristics, Ulna",
author = "H Hasselstr{\o}m and Karlsson, {K M} and Hansen, {S E} and V Gr{\o}nfeldt and K Froberg and Andersen, {L B}",
year = "2007",
month = "1",
day = "1",
doi = "10.1007/s00223-006-0137-9",
language = "English",
volume = "80",
pages = "31--38",
journal = "Calcified Tissue International",
issn = "0171-967X",
publisher = "Springer",
number = "1",

}

Peripheral bone mineral density and different intensities of physical activity in children 6-8 years old: the Copenhagen School Child Intervention study. / Hasselstrøm, H; Karlsson, K M; Hansen, S E; Grønfeldt, V; Froberg, K; Andersen, L B.

I: Calcified Tissue International, Bind 80, Nr. 1, 01.01.2007, s. 31-38.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Peripheral bone mineral density and different intensities of physical activity in children 6-8 years old: the Copenhagen School Child Intervention study

AU - Hasselstrøm, H

AU - Karlsson, K M

AU - Hansen, S E

AU - Grønfeldt, V

AU - Froberg, K

AU - Andersen, L B

PY - 2007/1/1

Y1 - 2007/1/1

N2 - This study aimed to evaluate the association between objectively measured habitual physical activity and calcaneal and forearm bone mineral density (BMD, g/cm(2)), one mechanically more loaded and one less loaded skeletal region, in children aged 6-8 years. BMD was measured in 297 boys and 265 girls by peripheral dual-energy X-ray absorptiometry in the forearm and calcaneus. An accelerometer registered the level of physical activity during 4 days (2 weekdays and the weekend). Weight, height, and skinfold thickness were measured. In order to establish thresholds (count . min(-1)) for bone-stimulating physical activity, we evaluated different definitions of vigorous physical activity. The boys had 3.2% higher distal forearm bone mineral content (BMC, P < 0.001) and 4.5% higher distal forearm BMD (P < 0.001) than the girls. They also carried out 9.7% more daily physical activity and spent 14.6-19.0% more time in vigorous physical activity (all P < 0.05) compared to the girls. In contrast, the girls had 3.8% higher calcaneal BMC (P < 0.01) and 2.5% higher calcaneal BMD (P < 0.05) than the boys. Both calcaneal and forearm BMD were significantly related to total time of daily physical activity as well as with intense physical activity above all the chosen cut-off points (all P < 0.05). The beta value for mean count . min(-1) physical activity was significantly lower than that for all the chosen cut-off points of vigorous activity both for calcaneal and distal forearm BMD. This study suggests that both habitual daily physical activity and amount of vigorous physical activity in children aged 6-8 years are associated with appendicular BMD.

AB - This study aimed to evaluate the association between objectively measured habitual physical activity and calcaneal and forearm bone mineral density (BMD, g/cm(2)), one mechanically more loaded and one less loaded skeletal region, in children aged 6-8 years. BMD was measured in 297 boys and 265 girls by peripheral dual-energy X-ray absorptiometry in the forearm and calcaneus. An accelerometer registered the level of physical activity during 4 days (2 weekdays and the weekend). Weight, height, and skinfold thickness were measured. In order to establish thresholds (count . min(-1)) for bone-stimulating physical activity, we evaluated different definitions of vigorous physical activity. The boys had 3.2% higher distal forearm bone mineral content (BMC, P < 0.001) and 4.5% higher distal forearm BMD (P < 0.001) than the girls. They also carried out 9.7% more daily physical activity and spent 14.6-19.0% more time in vigorous physical activity (all P < 0.05) compared to the girls. In contrast, the girls had 3.8% higher calcaneal BMC (P < 0.01) and 2.5% higher calcaneal BMD (P < 0.05) than the boys. Both calcaneal and forearm BMD were significantly related to total time of daily physical activity as well as with intense physical activity above all the chosen cut-off points (all P < 0.05). The beta value for mean count . min(-1) physical activity was significantly lower than that for all the chosen cut-off points of vigorous activity both for calcaneal and distal forearm BMD. This study suggests that both habitual daily physical activity and amount of vigorous physical activity in children aged 6-8 years are associated with appendicular BMD.

KW - Absorptiometry, Photon

KW - Bone Density

KW - Calcaneus

KW - Child

KW - Cross-Sectional Studies

KW - Denmark

KW - Female

KW - Humans

KW - Linear Models

KW - Male

KW - Motor Activity

KW - Radius

KW - Sex Characteristics

KW - Ulna

U2 - 10.1007/s00223-006-0137-9

DO - 10.1007/s00223-006-0137-9

M3 - Journal article

VL - 80

SP - 31

EP - 38

JO - Calcified Tissue International

JF - Calcified Tissue International

SN - 0171-967X

IS - 1

ER -