研究目的：探討台灣地區正常體重與過重／肥胖老年人之健康體適能。方法：78位年齡超過65歲的老年人自願參與本研究，並依據身體質量指數分為正常體重（<24.0 kg/m2）及過重／肥胖（≧24.0 kg/m2）兩組。健康體適能評估包括肌力、柔軟度、肌耐力、三分鐘登階測試，及身體組成分析。結果：過重／肥胖組之受試者收縮壓較高（p<0.05）。兩組間仰臥起坐測試，體脂肪比例，非脂肪組織重量，腰臀圍比和登階測試結果有統計上顯著差異（p<0.05），柔軟度及手握力則無顯著差異（p>0.05）。利用多重線性迴歸調整性別和年齡因素後分析顯示，兩組之間只有登階測試結果達到統計上顯著差異（p<0.05）。結論：過重／肥胖老年人之健康體適能較正常體重者低。這些發現建議肥胖老年人應接受規律的體適能評估，並需要適當的運動計畫以維持良好的體適能。

Purpose: To investigate health-related physical fitness in normal-weight and overweight/obese elderly in Taiwan. Methods: A total of 78 elderly (above 65-year-old) volunteers participated in this study and were divided into two groups by body mass index (< 24.0 kg/m2 and ≧ 24.0 kg/m2). Physical fitness evaluation included strength, flexibility, muscular endurance, three-minute stepping test, and body composition analysis. Results: Subjects in the overweight/obese group had higher systolic blood pressure (p < 0.05). There were significant differences in curl-up test, % body fat, fat free mass, waist/hip ratio, and physical efficiency index (PEI) derived from stepping test, but not in flexibility and grip strength, between the two groups. Multiple linear regression after adjusting for age and gender revealed that only the PEI was significantly different between the two groups (p < 0.05), while no significant difference was found in flexibility, grip strength and muscular endurance between the two groups. Conclusion: The overweight/obese group had lower physical fitness than their normal-weight counterparts. These findings suggest the importance of regular assessment of physical fitness in obese elderly and also the need to design an adequate exercise program for them to maintain good fitness.