scholarly journals Longitudinal Study of Calcium Intake, Physical Activity, and Bone Mineral Content in Infants 6-18 Months of Age

1999 ◽  
Vol 14 (4) ◽  
pp. 569-576 ◽  
Author(s):  
Bonny L. Specker ◽  
Lizanne Mulligan ◽  
Mona Ho
1995 ◽  
Vol 49 (3) ◽  
pp. 299-304 ◽  
Author(s):  
M F VandenBergh ◽  
S A DeMan ◽  
J C Witteman ◽  
A Hofman ◽  
W T Trouerbach ◽  
...  

2002 ◽  
Vol 14 (4) ◽  
pp. 358-368 ◽  
Author(s):  
Ann V. Rowlands ◽  
Sarah M. Powell ◽  
Roger G. Eston ◽  
David K. Ingledew

This study aimed to determine the relationship between bone mineral content, habitual physical activity, and calcium intake in children. Fifty-seven children, aged 8–11 years, wore pedometers for seven days to assess activity. Calcium intake was estimated by a 4-day food diary. Bone mineral content (BMC) and areal density (BMD) were measured at the total proximal femur and femoral neck using dual energy X-ray absorptiometry. Regression analysis was used to assess contributions of physical activity and calcium intake to BMC, residualized for bone area and body mass. Physical activity explained 11.6% of the variance in residualized BMC at the proximal femur and 14.3% at the femoral neck (p < 0.05). Calcium intake added to the variance explained at the proximal femur only (9.8%, p < 0.05). This study provides evidence for an association between BMC and habitual physical activity.


Author(s):  
Annie M. Constable ◽  
Josie E. Porter ◽  
Danielle Benger ◽  
Dimitris Vlachopoulos ◽  
Alan R. Barker ◽  
...  

Purpose: Moderate-to-vigorous physical activity (MVPA) positively influences bone mineral content (BMC) in prepubertal children, but it is unknown whether this relationship is partially mediated by free leptin index. The aim of this study was to examine whether the relationship between MVPA and total body less head (TBLH) BMC is mediated or moderated by free leptin index in prepubertal children. Methods: We performed a cross-sectional analysis on 401 children (194 girls) from baseline examinations of the Physical Activity and Nutrition in Childhood Study. We applied the four-way decomposition mediation analysis method to assess whether free leptin index, measured from fasted blood samples, mediated the relationship between accelerometer-measured MVPA and TBLH BMC measured by dual-energy X-ray absorptiometry. Results: MVPA had a positive controlled direct effect on TBLH BMC in girls and boys (β = 0.010 to 0.011, p < 0.05). There was no mediation or interaction between MVPA, free leptin index and TBLH BMC in girls or boys (β = −0.000 to 0.001, p > 0.05). Conclusion: Our study indicates that MVPA positively influences TBLH BMC through pathways not related to free leptin index in predominantly normal-weight prepubertal children, likely primarily through mechanical loading. The relationships between MVPA, free leptin index and TBLH BMC may be influenced by other factors such as pubertal status and adiposity, so it is unknown whether these observations extend to overweight and obese children at different stages of puberty.


Nutrients ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 1075 ◽  
Author(s):  
Victoria Muñoz-Hernandez ◽  
Lide Arenaza ◽  
Luis Gracia-Marco ◽  
Maria Medrano ◽  
Elisa Merchan Ramirez ◽  
...  

The objective of the present cross-sectional study was to examine the associations of physical activity and the adherence to the Mediterranean dietary pattern (MDP) with bone mineral content (BMC) and density (BMD) in children with overweight and obesity. A total of 177 (n = 80 girls) children with overweight and obesity aged 8 to 12 years old participated in the study. Both BMC and BMD were assessed by Dual-Energy X-ray absorptiometry. Dietary patterns were assessed by the KIDMED questionnaire and two 24-hour recalls. Physical activity was assessed by accelerometers for 7 consecutive days (24 hours/day). Low adherence to the MDP was observed in 82.4% of participants. Higher physical activity levels (of at least moderate intensity) and lower sedentary time were significantly associated with BMC and BMD in children with low adherence to the MDP (all p < 0.05). No associations were observed between physical activity and BMC and BMD in children with high adherence to the MDP. In conclusion, engaging in moderate to vigorous physical activity and reducing the time spent in sedentary behavior might be particularly beneficial for improving bone health in overweight or obese children with poor adherence to the Mediterranean dietary pattern.


2001 ◽  
Vol 20 (5) ◽  
pp. 502-509 ◽  
Author(s):  
Lisa M. Carter ◽  
Susan J. Whiting ◽  
Donald T. Drinkwater ◽  
Gordon A. Zello ◽  
Robert A. Faulkner ◽  
...  

2007 ◽  
Vol 39 (Supplement) ◽  
pp. S439
Author(s):  
Gunnhildur Hinriksdóttir ◽  
Sigurbjörn Á. Arngrímsson ◽  
Mark M. Misic ◽  
Daina M. Mallard ◽  
Ellen M. Evans

Bone ◽  
2007 ◽  
Vol 40 (6) ◽  
pp. S52-S53
Author(s):  
K.F. Janz ◽  
S.M. Levy ◽  
J.M. Eichenberger Gilmore ◽  
E.M. Letuchy ◽  
T.L. Burns ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document