Effects of physical training on cortical bone at midtibia assessed by peripheral QCT
Effects of physical training on cortical bone at midtibia assessed by peripheral QCT
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DOI：
10.1152/japplphysiol.01055.2002
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发表时间：
2003-07-01
影响因子：
3.3
通讯作者：
Tokuyama, K
中科院分区：
文献类型：
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作者：
Liu, LJ;Maruno, R;Tokuyama, K
采用横断面研究方法，对运动员和对照组进行了长期运动对骨密度、骨矿含量、骨几何特性和骨强度指标的影响研究。25名跳跃运动员（13名女性），30名游泳运动员（15名女性）和25名对照组（15名女性），年龄在18 - 23岁，胫骨中段进行了扫描，使用周边定量计算机断层扫描。女性运动员的皮质vBMD低于对照组（对照组、游泳运动员和跳高运动员的vBMD分别为2.00 ± 0.05、1.90 ± 0.08和1.92 ± 0.12 g/cm（3））。另一方面，男、女运动员的骨膜面积均大于对照组（男性对照组、游泳运动员和跳跃运动员分别为460 +/- 50、483 +/- 46和512 +/- 55 mm（2），男性对照组、游泳运动员和跳跃运动员分别为283 +/- 52、341 +/- 73和378 +/- 75 mm（2），用于女性对照、游泳者和跳跃者）。女性游泳运动员的皮质内面积大于对照组（对照组、游泳运动员和跳高运动员分别为103 ± 29、148 ± 52和135 ± 54 mm 2）。男、女运动员的极转动惯量和力量应变指数均显著大于对照组，但男、女运动员的力量应变指数差异不显著。我们的结论是，改善力学性能的年轻成人骨在长期运动的几何适应，而不是vBMD。
Effects of long-term exercise on volumetric bone mineral density (vBMD), bone mineral content, bone geometric properties, and the strength indexes of bone were examined in a cross-sectional study of athletes and controls. Tibias of 25 jumpers ( 13 women), 30 swimmers ( 15 women), and 25 controls ( 15 women), aged 18 - 23 yr, were scanned at midsite by using peripheral quantitative computed tomography. The cortical vBMD of female athletes was lower than that of the controls (2.00 +/- 0.05, 1.90 +/- 0.08, and 1.92 +/- 0.12 g/cm(3), respectively, for controls, swimmers, and jumpers). On the other hand, periosteal areas of male jumpers and female athletes were greater than that of controls ( 460 +/- 50, 483 +/- 46, and 512 +/- 55 mm(2), respectively, for male controls, swimmers, and jumpers, and 283 +/- 52, 341 +/- 73, and 378 +/- 75 mm(2), respectively, for female controls, swimmers, and jumpers). The endocortical area of female swimmers was greater than that of controls (103 +/- 29, 148 +/- 52, and 135 +/- 54 mm(2), respectively, for controls, swimmers, and jumpers). The polar moment of inertia and strength strain index of male jumpers and female athletes were significantly greater than those of controls, except for the difference in strength strain index between male jumpers and controls. We conclude that the improvement of mechanical properties of young adult bone in response to long-term exercise is related to geometric adaptation and not to vBMD.