Daily physical activity related to body fat in children aged 8-11 years.
OBJECTIVE
To evaluate the association between objectively measured daily physical activity and body fat.


METHODS
Cross-sectional, observational, study of 248 children aged 7.9 to 11.1 years. Abdominal fat mass and total body fat mass were measured by dual-energy X-ray absorptiometry. Daily physical activity was assessed by accelerometers for 4 days.


RESULTS
Total body fat expressed as a percentage of body mass was inversely related to minutes of vigorous physical activity per day, for all children r = -0.38 (P < .05). Children, both boys and girls, in the highest quartile of body fat performed on average 12 minutes less vigorous activity per day compared with their counterparts in the lowest quartile. Multiple regression analysis revealed that independent factors for body fat were number of minutes of vigorous activity per day and sex.


CONCLUSIONS
Low physical activity can be a contributing factor in childhood obesity. Only longitudinal studies, however, can give more definitive information about the relation between daily physical activity and obesity.
Dencker
M
M
Department of Clinical Sciences, Malmö, Lund University, Sweden. magnus.dencker@skane.de
Thorsson
O
O
Karlsson
M K
MK
Lindén
C
C
Eiberg
S
S
Wollmer
P
P
Andersen
L B
LB
D015502:Absorptiometry, Photon; D050218:Body Fat Distribution; D015992:Body Mass Index; D002648:Child; D015331:Cohort Studies; D003430:Cross-Sectional Studies; D005260:Female; D015438:Health Behavior; D006801:Humans; D008297:Male; D009043:Motor Activity; D009765:Obesity / Q000453:epidemiology*; D012044:Regression Analysis; D012737:Sex Factors; D013548:Sweden / Q000453:epidemiology