Adolescent exercise associated with long-term superior measures of bone geometry: a cross-sectional DXA and MRI study
Adolescent exercise associated with long-term superior measures of bone geometry: a cross-sectional DXA and MRI study
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DOI：
10.1136/bjsm.2008.052308
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发表时间：
2009-11-01
影响因子：
18.4
通讯作者：
Umemura, Y.
中科院分区：
文献类型：
--
作者：
Kato, T.;Yamashita, T.;Umemura, Y.
目的：探讨儿童期参加体育运动，特别是负重运动，是否对中年绝经后妇女的骨矿物质含量（BMC）、面骨密度（aBMD）和骨几何特征有任何影响。（平均年龄60.2（SD 5.6）岁;范围52-73岁）根据生长期间的运动参与情况进行分组：负重运动，包括高冲击负重活动;和低冲击非负重运动或不参与。主要结果测量：双能X线吸收法（DXA）-测量腰椎和股骨的BMC、aBMD。磁共振成像（MRI）确定股骨的骨几何特征，如股骨中段骨干横截面积、骨膜和骨内膜周长以及最大和最小面积二阶矩。绝经后中年妇女初中至高中期间参加负重运动的情况（12-18岁）在腰椎和股骨颈区域显示出显著更大的BMC，并且股骨中段骨干骨横截面积也显著更大，结论：青少年负重运动对股骨中段的大小和形态有明显的影响，而DXA测量的BMC有效地识别了同样的趋势。青年时期的负重运动会影响骨骼，这些影响可能会在40年后保留为BMC，几何和结构优势。
Objective: To investigate whether childhood sports participation, particularly weight-bearing sports, has any effect on bone mineral content (BMC), areal bone mineral density (aBMD) and bone geometric characteristics in middle-aged postmenopausal women.Design/setting: In this cross-sectional comparison of two groups, 46 middle-aged women (mean age, 60.2 (SD 5.6) years; range, 52-73 years) were grouped according to sport participation during growth: weight-bearing sports, including high-impact weight-bearing activities; and low-impact non-weight-bearing sports or no participation.Main outcome measures: Dual energy X-ray absorptiometry (DXA)-measured BMC, aBMD in the lumbar spine and femur. Magnetic resonance imaging (MRI) determined bone geometric characteristics in the femur, such as femoral mid-diaphyseal cross-sectional area, periosteal and endosteal perimeters and maximum and minimum second moment of area.Results: Postmenopausal middle-aged women with participation in weight-bearing sports during junior high to high school (12-18 years old) displayed significantly greater BMC in both lumbar spine and femoral neck regions, and also significantly greater femoral mid-diaphyseal bone cross-sectional area, periosteal perimeter and maximum and minimum second moment of area than the non-weight-bearing sports group.Conclusions: Adolescent weight-bearing exercise exerts preservational effects on femoral mid-diaphyseal size and shape, while DXA-measured BMC effectively identified the same tendency. Weight-bearing exercise in youth affects bone, and these effects may be preserved as BMC, geometric and structural advantages even after 40 years.