Van Langendonck Leen, Claessens Albrecht L, Lefevre Johan, Thomis Martine, Philippaerts Renaat, Delvaux Katrien, Lysens Roeland, Vanden Eynde Bavo, Beunen Gaston
Department of Sport and Movement Sciences, Faculty of Physical Education and Physiotherapy, KU Leuven, Tervuursevest 101, B-3001 Leuven, Belgium.
Am J Hum Biol. 2002 Nov-Dec;14(6):735-42. doi: 10.1002/ajhb.10090.
The association between bone mass, body structure, and body composition was explored in 156 men, 40 years of AGE. Bone mineral density (total body, lumbar spine, left arm, and left leg) was obtained by dual-energy X-ray absorptiometry (DXA; Hologic QDR 4500A). Body structure was determined from a battery of anthropometric dimensions with a principal components analysis. Body composition was estimated with DXA. From the 24 anthropometric dimensions, three components were extracted and identified as muscle, fat, and skeletal length. Significant correlations between the muscle component and all BMD measurements (r = 0.28-0.44) were obtained. Except for BMD of the left arm, which correlated significantly, but negatively, with the fat component (r = -0.16), no significant relations were found between the fat component and BMD. There were significant correlations between lean mass, fat mass, and BMD measurements. The correlations were higher between lean mass and BMD (r = 0.22-0.44) than between fat mass and BMD (r = 0.08-0.24). The multiple regression analysis revealed that except for BMD of the left arm only lean mass or the muscle component, and not fat mass or the fat component, were independent predictors of BMD. It is concluded that the principal anthropometric determinant of BMD in middle-aged men is lean mass or muscle.
在156名40岁男性中探究了骨量、身体结构和身体成分之间的关联。通过双能X线吸收法（DXA；Hologic QDR 4500A）获得骨矿物质密度（全身、腰椎、左臂和左腿）。通过一系列人体测量维度并运用主成分分析来确定身体结构。用DXA估算身体成分。从24项人体测量维度中提取出三个成分，分别确定为肌肉、脂肪和骨骼长度。肌肉成分与所有骨密度测量值之间存在显著相关性（r = 0.28 - 0.44）。除了左臂骨密度与脂肪成分存在显著的负相关（r = -0.16）外，脂肪成分与骨密度之间未发现显著关系。瘦体重、脂肪量与骨密度测量值之间存在显著相关性。瘦体重与骨密度之间的相关性（r = 0.22 - 0.44）高于脂肪量与骨密度之间的相关性（r = 0.08 - 0.24）。多元回归分析显示，除了左臂骨密度外，只有瘦体重或肌肉成分，而非脂肪量或脂肪成分，是骨密度的独立预测因素。得出的结论是，中年男性骨密度的主要人体测量决定因素是瘦体重或肌肉。
