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KMID : 0978920110120040160
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Korean Journal of Clinical Geriatrics
2011 Volume.12 No. 4 p.160 ~ p.169
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Relationship between Body Composition and Bone Mineral Density in Elderly
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Yi Gil-Sang
Oh Mi-Kyeong
Kim Haa-Gyoung
Kang Joo-An
Kim Jin-Young
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Abstract
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Background: Traditionally, It is known that bone mineral density (BMD) increases as body weight increases. However, recent epidemiologic studies have described an opposite events. There are controversial issues as to whether lean mass or fat mass might to the most determinant of BMD. Our aim was to evaluate the associations between both lean body mass or fat mass and BMD in elderly.
Methods: The design is a cross-sectional analysis. 121 male and 416 female elderly who were all over 60 years of age were had participated in Dual-energy X-ray absorptiometry for BMD and bioimpedance analysis for body composition. The relationships of BMD and body weight, waist circumference, body composition variables were analyzed.
Results: In elderly, BMD was higher as body mass index, and lean body mass had more significant correlation with BMD than body fat. After adjusting for age, life style, weight and height, waist circumference was negatively related to BMD in man. In women, lean body mass and muscle mass were positively, waist circumference and fat mass were negatively related to BMD. Limb muscle mass was more correlated with BMD than trunk muscle mass.
Conclusion: Lean body mass among body composition, seems to have a greater influence on BMD than fat mass in elderly. Waist circumference as a visceral fat index showed negative effect on bone mass. Therefore, it is considered necessary for the elderly to increase the muscle mass through exercises and to keep desirable body shape for the increasing BMD.
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KEYWORD
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Bone mineral density (BMD), Body composition, Osteoporosis, Le an body mass, Fat mass
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