TY  - JOUR
A1  - Rietsch, Katrin
A1  - Eccard, Jana
A1  - Scheffler, Christiane
T1  - Decreased external skeletal robustness due to reduced physical activity?
JF  - American journal of human biology : the official journal of the Human Biology Council
N2  - Objectives Childhood obesity is a global problem, e.g., due to physical inactivity. External skeletal robustness (Frame-Index) has decreased in German schoolchildren. An association between Frame-Index and physical activity was assumed. Further often body mass index (BMI) is analyzed without reference to bone structure. Therefore, we analyze relationships between Frame-Index, BMI, % body fat, and physical activity. Methods In a cross-sectional study, 691 German children aged 610 years were investigated. BMI, % body fat, Frame-Index, total steps p.w., sports club rate p.w., training time p.d., and TV-time p.d. were determined. Results Total steps (P<0.001), BMI (P<0.001), and % body fat (P=0.024) are positively linked to Frame-Index. Total steps (P<0.001), sports club rate (P=0.001), and training time (P<0.001) are negatively associated with % body fat. Total steps (P=0.017) are negatively linked to BMI. TV-time is positively related to BMI (P<0.001) and % body fat (P<0.001). % Body fat is affected by age (P<0.001), sex (P=0.028), and total steps (P=0.002). BMI is influenced by age (P<0.001), and Frame-Index by sex (P<0.001) and total steps (P=0.029). Principal component analysis indicates an association between BMI and TV-time and Frame-Index and total steps. Conclusions We demonstrate an association between external skeletal robustness and physical activity, which is not captured by in BMI measurements. Children should be physically active in order to maintain skeletal robustness. Am. J. Hum. Biol. 25:404410, 2013.
Y1  - 2013
U6  - https://doi.org/10.1002/ajhb.22389
SN  - 1042-0533
SN  - 1520-6300
VL  - 25
IS  - 3
SP  - 404
EP  - 410
PB  - Wiley-Blackwell
CY  - Hoboken
ER  -