目的：藉由量測老年人身高、體重及靜態平衡表現，探討身體組成與靜態平衡表現之間的關係。方法：計有37名受試者完成實驗，年齡74.59±5.40歲，身高155.47±6.90cm，體重60.38±7.40kg，身體質量指數24.98±2.77kg/平方公尺。直接量測所有受試者的身高及體重，計算身體質量指數，定義為身體組成；再以固定測力板施行五種靜態平衡動作測驗，包含開眼單足立、開眼分足立、閉眼分足立、開眼併足立及閉眼併足立，所量測之壓力中心擺動軌跡長度及擺動面積定義為靜態平衡表現。以皮爾森積差相關法分別分析身體組成與靜態平衡表現之間的關係。結果：身體組成與開眼分足立的壓力中心擺動面積，以及開眼併足立的靜態平衡表現，分別呈顯著正相關。身高則分別與單足立靜態平衡表現，以及閉眼分足立壓力中心擺動軌跡長度，達顯著正相關。體重方面，則與單足立、併足立及開眼分足立靜態平衡表現之間呈顯著正相關。結論：老年人身高愈高，或是體重愈重者，靜態平衡表現愈差。推測老年人的身體型態可能影響其靜態平衡表現；身高或是體重的改變，可能造成身體質量及重心產生改變及轉移，影響身體平衡狀態。建議老年人應適當控制體重，重視飲食攝取及養成規律運動習慣，期能有助於維持靜態平衡表現。

Purpose: To test and verify the hypothesis that report of better static balance ability in the elderly would be associated with better body mass, including normal body weight or body mass index (BMI). Method: Thirty-seven elderly people who completed all measurements were, aged 74.59±5.40 years, height 155.48±6.90 cm, weight 60.38±7.40 kg, and BMI was 24.98±2.77 kg/cm^2. The static balance indicated the path length (PL) and the body sway area (SA) of the centre of pressure were measured by five static balance tests with the stable force platform, including the one-leg standing (OLS) with eyes open, two-leg standing with feet apart (FA) and together (FT), two-leg stance positions were with eyes opened (FAO, FTO) and closed (FAC, FTC). Associations among height, weight, and the static balance were evaluated using Pearson's product-moment correlation. Results: There were significant positive correlations between BMI and SA of FAO and FTO, respectively. And the height was significant positive correlated with OLS, and the PL of the FAC, respectively. In the weight, there were also significant positive correlations between OLS, FAO, and FT, respectively. Conclusions: It showed that the taller or the heavier, the static balance worse. It was presumed that static balance might be influenced from the body mass in the elderly. Hence, the body mass and the centre of pressure might be altered, when the height or weight was changed, and the systems of body balance would be affected. To maintain the static balance, the elderly have to control the body weight, attach importance to daily diets and physical activities. Further investigations on the factors influenced balance of the elderly are required to improve the balance of the elderly.