Burt L A, Naughton G A, Greene D A, Ducher G
Centre of Physical Activity Across the Lifespan, Australian Catholic University, School of Exercise Science, Locked Bag 2002, Strathfield, NSW, Australia.
J Musculoskelet Neuronal Interact. 2011 Sep;11(3):227-33.
To compare skeletal parameters between the ulna and radius in pre-pubertal non-elite gymnasts and non-gymnasts.
Fifty-eight non-elite artistic gymnasts, aged 6-11 years, were compared with 28 non-gymnasts for bone mineral content (BMC), total and cortical bone area (ToA, CoA), trabecular and cortical volumetric density (TrD, CoD) and estimated bone strength (BSI and SSIp), obtained by pQCT at the distal and proximal forearm.
Gymnasts had greater estimated bone strength than non-gymnasts at both sites of the forearm. At the distal forearm, the gymnastics-induced skeletal benefits were greater at the radius than ulna (Z-scores for BMC, TrD and BSI +0.40 to +0.61 SD, p<0.05 vs. +0.15 to +0.48 SD, NS). At the proximal forearm, the skeletal benefits were greater at the ulna than the radius (Z-scores for BMC, ToA, CoA and SSIp +0.59 to +0.82 SD, p<0.01 vs. +0.35 (ToA) and +0.43 SD (SSIp), p<0.01).
Skeletal benefits at the distal and proximal forearm emerged in young non-elite gymnasts. Benefits were larger when considering skeletal parameters at both the ulna and radius, than the radius alone as traditionally performed with pQCT. These findings suggest the ulna is worth investigating in future studies aiming to accurately quantify exercise-induced skeletal adaptations.
比较青春期前非精英体操运动员与非体操运动员尺骨和桡骨的骨骼参数。
选取58名6至11岁的非精英艺术体操运动员，与28名非体操运动员进行比较，通过前臂远端和近端的外周定量计算机断层扫描（pQCT）测量骨矿物质含量（BMC）、总骨面积和皮质骨面积（ToA、CoA）、小梁骨和皮质骨体积密度（TrD、CoD）以及估计骨强度（BSI和SSIp）。
体操运动员在前臂两个部位的估计骨强度均高于非体操运动员。在前臂远端，体操运动对骨骼的益处桡骨大于尺骨（BMC、TrD和BSI的Z值为+0.40至+0.61标准差，p<0.05，而尺骨为+0.15至+0.48标准差，无显著性差异）。在前臂近端，骨骼益处尺骨大于桡骨（BMC、ToA、CoA和SSIp的Z值为+0.59至+0.82标准差，p<0.01，而桡骨ToA为+0.35标准差，SSIp为+0.43标准差，p<0.01）。
年轻的非精英体操运动员在前臂远端和近端均出现了骨骼益处。与传统pQCT单独测量桡骨相比，同时考虑尺骨和桡骨的骨骼参数时益处更大。这些发现表明，在未来旨在准确量化运动引起的骨骼适应性变化的研究中，尺骨值得深入研究。
