Modifiable determinants of bone status in young women
Modifiable determinants of bone status in young women
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DOI：
10.1016/s8756-3282(01)00675-5
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发表时间：
2002-02-01
期刊：
影响因子：
4.1
通讯作者：
Seeman, E
中科院分区：
文献类型：
--
作者：
Lloyd, T;Beck, TJ;Seeman, E
The purpose of this study was to evaluate the contributions of exercise, fitness, body composition, and calcium intake during adolescence to peak bone mineral density, and bone structural measurements in young women. University Hospital and 75 healthy, white females in the longitudinal Penn State Young Women's Health Study, were included. Body, composition, total body, and hip bone mineral density (BMD) were measured by dual-energy X-ray absorptiometry (DXA), exercise scores by sports-exercise questionnaire during ages 12-18 years, and estimated aerobic capacity by bike ergometry. Section modulus values (a measurement of bending strength) cross-sectional area (CSA), subperiosteal width, and cortical thickness were calculated from DXA scan data for the femoral neck and femoral shaft. Calcium intakes were calculated from 39 days of prospective food records collected at 13 timepoints between ages 12 and 20 years; supplemental calcium intakes were included. Section moduli at the femoral neck and shaft were correlated significantly with lean body mass, sports-exercise scores (R-2=0.07-0.19, p
