目的：身為醫院員工卻有比一般人更高的過重或肥胖盛行率，因此該醫院於102年七月至九月舉辦員工減重活動，藉由獎勵措施、健康飲食及有氧運動協助員工減重。本研究針對該活動成效做分析探討供未來減重活動參考。方法：邀請醫院員工參加八週減重競賽，依員工意願分自主管理與積極介入兩組。自主管理成員自由參加4場健康飲食講座及每週一次有氧運動；積極介入組要求務必參加4場健康飲食講座，每週二次有氧運動及重量訓練。收集資料含前後測身高、體重、BMI值、腰圍、血壓。結果：共70位員工參加，有效樣本數52位(自主管理27位，積極介入25位)。八周後平均減重3.2kg(自主管理減重2.9kg，積極介入減重3.6kg)；整體BMI下降1.2(自主管理BMI減少1.1，積極介入減少1.2)；整體腰圍平均減少4.2cm(自主管理減少4.1cm，積極介入減少4.4cm)。經統計分析後，比較前後測積極介入與否只有BMI及腰圍改善有統計上顯著差異。結論：運動介入及飲食控制計劃確實可降低員工體重，但是積極介入與否與自主管理並無統計顯著差異。未來減重活動是否需要積極介入才能看見介入成效，值得思考。

Introduction: Obesity is well-known for its correlation with high risk of diabetes and cardiovascular disease. Previous studies have shown a higher prevalence of obesity in hospital employees. In our hospital, we also have a higher prevalence of obesity than common people in Taiwan. Since the prevalence of obesity continues to increase, there is a demand for effective and safe weight-reduction program that can produce and maintain weight loss. Therefore, we design a 8-week weight-loss program for hospital employees, including the overweight (BMI 24–27 kg/m2) and obese (BMI ≥ 27 kg/m2) hospital employees. Purpose: The purpose of this study aims to understand the body composition change of hospital employees of both genders after 2 days a week’s aerobic exercise and once a week’s nutrition programs which altogether lasts for 8 weeks (Experiment group). Besides, we also arrange a 1 days a week’s aerobic exercise and once a week’s nutrition programs as a control group. A total of 70 hospital employees were included. (From September 1, 2013, to October 31, 2013). Main Outcome Measures: Change in body weight, BMI, waist circumference, and blood pressure. Results: A total of 70 hospital employees were included. were included and completed the intervention. After 2 months of weight loss program, all the participants gain an mean 3.2 kg of weight reduction among 70 people. The experiment-group participants had a 3.6kg mean reduction in weight and the control-group participants had a 2.9kg mean reduction in weight. There were also decreases in BMI and waist circumference. Conclusion: The method of aerobic exercise and dietary intervention lasts 8 weeks can effectively reduce Body weight, BMI and waist circumference. We recommend that hospital employees do exercise on a regular basis, maintain a healthy diet and ideal body weight, especially for men, to reduce the risk and progression of age-related chronic diseases such as diabetes and heart disease. However, whether doing more aerobic exercise is useful in helping participants achieved the goal of weight loss or not deserves consideration.