Hamdy R C, Anderson J S, Whalen K E, Harvill L M
Department of Internal Medicine, East Tennessee State University, Johnson City 37614-0002.
Med Sci Sports Exerc. 1994 Jul;26(7):884-8.
In this cross-sectional, retrospective study, the bone mineral content (BMC) and density (BMD) of the whole skeleton, upper limbs, lower limbs, femoral neck, and lumbar vertebrae were measured using dual photon absorptiometry and the results compared in healthy young males involved in: weight-lifting, running, cross-training, or recreational exercises. When adjusted for body weight, the upper limb BMD was highest in those engaged solely in weight-lifting (mean 1.021, SE 0.019, and 95% CI 0.981-1.061) and lowest in runners (mean 0.908, SE 0.019 and 95% CI 0.869-0.946). These differences were significant (P = 0.0004). There were no significant differences in upper limb BMD between weight-lifters and cross-trained athletes and between runners and those engaged in recreational exercises. Significant differences in BMD were observed between weight-lifters and recreational athletes (P = 0.001) and between cross-trained athletes and runners (P = 0.03). No other significant differences were observed. These data suggest that healthy, young, adult males reporting a history of intensive weight-lifting had significantly greater bone mass of the upper limb bones than those reporting a history of non-weight-lifting exercises. These results imply a specific versus generalized effect of mechanical load on bones of the skeleton.
在这项横断面回顾性研究中，使用双能光子吸收法测量了参与举重、跑步、交叉训练或休闲运动的健康年轻男性的全身骨骼、上肢、下肢、股骨颈和腰椎的骨矿物质含量（BMC）和骨密度（BMD），并对结果进行了比较。调整体重后，仅从事举重的人的上肢骨密度最高（平均值1.021，标准误0.019，95%可信区间0.981 - 1.061），而跑步者的上肢骨密度最低（平均值0.908，标准误0.019，95%可信区间0.869 - 0.946）。这些差异具有统计学意义（P = 0.0004）。举重运动员和交叉训练运动员之间以及跑步者和从事休闲运动的人之间的上肢骨密度没有显著差异。在举重运动员和从事休闲运动的运动员之间（P = 0.001）以及交叉训练运动员和跑步者之间（P = 0.03）观察到骨密度存在显著差异。未观察到其他显著差异。这些数据表明，有高强度举重史的健康年轻成年男性的上肢骨骼骨量明显高于有非举重运动史的男性。这些结果暗示了机械负荷对骨骼的特定而非普遍影响。
