Komissarova E N
Arkh Anat Gistol Embriol. 1984 Oct;87(10):35-9.
Metacarpal bones have been examined in hand X-ray photos of 125 sportsmen at the age of 17-18 years who go in for swimming (dynamic loading on the hand) and competitive gymnastics (static loading on the hand). Under the effect of systematic trainings, which are connected with an increased loading on the hand, a number of morphological changes take place in the metacarpal bones. A prolonged loading of the dynamic character delays the synostosis process in the distal parts of the forearm bones and contributes to lengthening the I, III and IV and to widening the I-V metacarpal bones. As demonstrate decreasing indices of compactness in the swimmers, the widening diaphisis of the metacarpal bones occurs at the expense of dilatation of the medullary cavity. The static loadings result in a greater delay of the synostosis processes in the upper extremity parts mentioned, in a greater width of the I-III, V metacarpal bones in boy-gymnasts. The increased index of compactness demonstrates that the widening diaphysis of the metacarpal bones takes place at the expense of thickening of the compact substance and narrowing of the medullary cavity.
对125名17 - 18岁从事游泳（手部承受动态负荷）和竞技体操（手部承受静态负荷）的运动员的手部X光照片中的掌骨进行了检查。在与手部负荷增加相关的系统性训练的影响下，掌骨会发生一些形态变化。动态性质的长期负荷会延迟前臂骨远端的骨融合过程，并导致第I、III和IV掌骨变长以及第I - V掌骨变宽。游泳运动员骨密度指标下降表明，掌骨干增宽是由于髓腔扩张所致。静态负荷导致上述上肢部位的骨融合过程延迟更明显，男体操运动员的第I - III、V掌骨更宽。骨密度指标增加表明，掌骨干增宽是由于骨密质增厚和髓腔变窄所致。
