Trabecular bone microarchitecture in female collegiate gymnasts
Trabecular bone microarchitecture in female collegiate gymnasts
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DOI：
10.1007/s00198-007-0522-x
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发表时间：
2008-07-01
影响因子：
4
通讯作者：
Dudley, G. A.
中科院分区：
文献类型：
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作者：
Modlesky, C. M.;Majumdar, S.;Dudley, G. A.
通过高分辨率磁共振成像，我们观察到女大学体操运动员胫骨近端骨小梁微结构比对照组更发达。这表明高负荷体力活动可能对负重骨的小梁微结构有积极影响。参加使骨骼负荷过重的体育活动，如艺术体操，与面骨矿物质密度（aBMD）增加有关；然而，在体操运动员的负重骨中，小梁微结构的状况尚不清楚。方法选取年龄、身高、体重、性别、种族相匹配的高校艺术体操女运动员8名和对照组8名。骨小梁表观体积与总体积之比（appBV/TV），骨小梁数量(appTb；采用高分辨率磁共振成像技术测定N)、厚度（appTb.Th）和小梁间距（appTb.Sp）。采用双能x线骨密度仪测定胫骨近端骨密度、骨矿物质含量（BMC）和骨面积。采用t检验确定组间差异。组间差异的大小用Cohen’s d (d)表示。结果体操运动员的appBV/TV （13.6%, d=1.22）和appTb较高。N （8.4%, d=1.45）和较低的appTb。Sp （13.7%, d=1.33）高于对照组（p < 0.05）。体操运动员胫骨近端aBMD和BMC较高，但差异幅度较小（d分别为0.75和0.74），无统计学意义（p < 0.05）。结论高负荷运动，如体操训练，可增强负重骨小梁微结构。
Using high-resolution magnetic resonance imaging, we observed more developed trabecular bone micro-architecture in the proximal tibia of female collegiate gymnasts vs. matched controls. This suggests that highload physical activity may have a positive effect on the trabecular microarchitecture in weight-bearing bone.Introduction Participation in physical activities that overload the skeleton, such as artistic gymnastics, is associated with increased areal bone mineral density (aBMD); however, the status of trabecular microarchitecture in the weight-bearing bone of gymnasts is unknown.Methods Eight female collegiate artistic gymnasts and eight controls matched for age, height, body mass, gender and race were recruited for the study. Apparent trabecular bone volume to total volume (appBV/TV), trabecular number (appTb.N), thickness (appTb.Th) and trabecular separation (appTb.Sp) were determined using high resolution magnetic resonance imaging. Areal bone mineral density, bone mineral content (BMC) and bone area in the proximal tibia were determined using dual-energy X-ray absorptiometry. Group differences were determined using t-tests. The magnitude of group differences was expressed using Cohen's d (d).Results Gymnasts had higher appBV/TV (13.6%, d=1.22) and appTb.N (8.4%, d=1.45), and lower appTb.Sp (13.7%, d=1.33) than controls (p < 0.05). Gymnasts had higher aBMD and BMC in the proximal tibia, although the differences were smaller in magnitude (d=0.75 and 0.74, respectively) and not statistically significant (p > 0.05).Conclusion The findings suggest that high-load physical activity, such as performed during gymnastics training, may enhance the trabecular microarchitecture of weight-bearing bone.