Faulkner R A, Houston C S, Bailey D A, Drinkwater D T, McKay H A, Wilkinson A A
College of Physical Education, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 0W0.
College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 0W0.
Am J Hum Biol. 1993;5(4):491-499. doi: 10.1002/ajhb.1310050413.
The bone mineral content (BMC), bone mineral density (BMD), and bone free lean tissue (BFLT) of dominant limbs were compared to nondominant values in girls and boys 8-16 years of age (girls, n = 124; boys, n = 110). Results showed that BMC, BMD, and BFLT of the dominant arm was significantly greater than of the nondominant arm (P < .01). The differences were found for both boys and girls and across all age groups except for 8 to 9-year-old boys for BMC. There were no differences in BMC or BMD in the legs, but the dominant leg had significantly greater BFLT than the nondominant leg (P < .01). The greater BMC and BMD values of the dominant arm are likely a result of greater mechanical loading (resulting from normal daily activities) of the dominant arm; this speculation is supported by the greater muscularity in the dominant arm. In the legs it is likely that weight bearing and not bias muscular activity is more important in determining bone mineral status. © 1993 Wiley-Liss, Inc.
对8至16岁女孩和男孩（女孩n = 124；男孩n = 110）优势肢体的骨矿物质含量（BMC）、骨矿物质密度（BMD）和无骨瘦组织（BFLT）与非优势肢体的值进行了比较。结果显示，优势手臂的BMC、BMD和BFLT显著高于非优势手臂（P <.01）。男孩和女孩以及除8至9岁男孩的BMC外的所有年龄组均发现了差异。腿部的BMC或BMD没有差异，但优势腿的BFLT显著高于非优势腿（P <.01）。优势手臂较高的BMC和BMD值可能是优势手臂承受更大机械负荷（源于日常正常活动）的结果；优势手臂更强的肌肉发达程度支持了这一推测。在腿部，负重而非偏向性肌肉活动在决定骨矿物质状态方面可能更为重要。© 1993威利 - 利斯公司。
