游泳選手雖然運動訓練的時間較一般人長，但體脂肪比例卻較常人高。本研究的主要目的為觀察大學游泳選手葡萄糖耐受度與胰島素敏感度的特性。我們也觀察這些受試者其胰島素敏感度與血脂肪濃度之間的關聯。共有九位大學游泳校隊選手（年齡20.6±0.53歲）與十六位無運動習慣的大學生（年齡19.7±0.11歲）參與本研究。在48小時停止訓練後，空腹狀態下進行口服葡萄糖耐受度試驗(OGTT)並觀察血清胰島素反應。血液三酸甘油脂與膽固醇濃度同時被測定。這些游泳選手腰臀圍比值(WHR)與身體質量指數(BMI)明顯高於無運動習慣的大學生，顯示其相對肥胖的程度。在OGTT過程中葡萄糖濃度兩組雖無差異，但游泳選手之胰島素濃度反應較低。我們也觀察到無運動習慣的大學生其胰島素反應之變異程度較游泳選手高出67%。此外，游泳選手血液三酸甘油脂與膽固醇濃度明顯高於無運動習慣的大學生。本研究結果顯示游泳訓練具有提昇胰島素敏感度的正面效益。本研究亦顯示血脂肪濃度似乎與其肥胖程度有關。

Trained swimmer typically exhibits greater fatness during training period but exhibits significantly greater exercise time than average people. The purpose of the study was to determine the characteristic in glucose tolerance and insulin sensitivity in collegiate swimmers. The relationship between insulin sensitivity and blood lipid profile were also investigated. Nine collegiate swimmers (age 20.6±0.53 yr) and sixteen sedentary college students (age 19.7±0.11 yr) voluntarily participated in this study. Under fasted condition, oral glucose tolerance test (OGTT) and insulin response were measured at least 48 hours after the last bout of regular swimming training. The blood cholesterol and triglyceride were also determined. These swimmers displayed significant greater waist-to-hip ratio and BMI than those of sedentary students (p<.05), indicating a trend toward obesity. Regardless, glucose tolerance was not different between swimmers and sedentary students, but the insulin response during OGTT was significantly smaller in swimmers than that in sedentary students. In addition, blood cholesterol and triglyceride levels were significantly higher in swimmers than sedentary students. The current study demonstrated that swimming training could enhance insulin sensitivity but greater blood lipid levels appeared to be associated with greater fatness.