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- W2077459479 abstract "Purpose: Low calcium intake during childhood is linked to an increased risk of childhood fractures and osteoporosis in adulthood. The interaction between calcium intake and exercise during childhood is poorly understood. Our aim was to examine the permissive role of calcium on the bone response to mechanical loading in pre-pubertal children. Previously, we reported significant gains in hip and spine bone mass in children engaged in a 7-month, high-impact jumping program. In this study we report the bone response to high-impact jumping by examining three levels of calcium intake. Methods: Bone mineral content (BMC; g) of the left proximal femoral neck and lumbar spine (L1-4) were assessed by DXA (Hologic QDR/4500-A). Children were placed into one of three calcium groups: low Ca2+: (500–850 mg), med Ca2+: (850–1200 mg) and high Ca2+: (1200–2200 mg). Analyses were performed separately for jumpers and controls. Results: In ANCOVA, entering femoral neck BMC difference scores as the dependent variable, calcium group as the fixed variable and age, height and weight change scores and initial femoral neck BMC as covariates, there were no significant differences in femoral neck BMC between calcium groups for both jumpers or controls (Table 1). In a similar ANCOVA analysis, entering lumbar spine BMC difference scores as the dependent variable there were no significant differences in lumbar spine BMC between calcium groups for jumpers or controls (Table 1).TableConclusion: In conclusion, we report that a high-impact jumping program consisting of 300 jumps/week off 62 cm boxes was not significantly influenced by calcium intake in our cohort of pre-pubertal children. This conclusion should be further examined in randomized controlled calcium plus exercise intervention trials." @default.
- W2077459479 created "2016-06-24" @default.
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- W2077459479 date "2002-05-01" @default.
- W2077459479 modified "2023-09-25" @default.
- W2077459479 title "SHORT-TERM BONE GAINS IN CHILDREN ARE SIMILAR REGARDLESS OF CALCIUM INTAKE" @default.
- W2077459479 doi "https://doi.org/10.1097/00005768-200205001-00311" @default.
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