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題 名 | 肥胖婦女減重前後體組成及熱量代謝之變化=Changes of Body Composition and Energy Metabolism in Obese Women Before and after Weight Reduction |
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作 者 | 葉松鈴; 劉美媛; 陳維昭; | 書刊名 | 中華民國營養學會雜誌 |
卷 期 | 23:2 1998.05[民87.05] |
頁 次 | 頁133-145 |
分類號 | 415.599 |
關鍵詞 | 肥胖; 減重; 體組成; 休息狀態下之熱量代謝; Obesity; Weight reduction; Body composition; Resting metabolic rate; |
語 文 | 中文(Chinese) |
中文摘要 | 由於社會經濟之繁榮,國人近年來體重過重有逐年增加的趨勢,雖然大部分體重過重者都有減重的意願,但減重後體重再度回升的比例很高。由於在體重之控制中熱量代謝之調節是很重要之因素,而目前國內並無關於減重前後熱量代謝變化之研究,因此本實驗之目的在比較停經前之肥胖女性,減重前體位、體組成及熱量代謝與正常體重女性之差異,並比較肥胖女性減重前後體位、體組成及熱量代謝變化之情形。將67名肥胖婦女依其肥胖程度將身體質量指數(BMI)值26.4-30.8 kg/m2者分為輕度肥胖組,而BMI>30.8 kg/m2以上者分為中度肥胖組,以飲食控制方式減輕體重,追蹤半年。在受測者中選取體重減輕大於原體重5%以上者29人,並選取與減重者年齡身高相配合之正常體重者18人做為控制組,加以分析比較。結果顯示不同程度肥胖女性之間,不管是體重(BW)、皮下脂肪厚度、上臂肌圍、瘦體組織(FFM)及脂肪組織重量皆有顯著之不同,且中度肥胖組大於輕度肥胖組,輕度肥胖組又大於正常體重組。三頭肌皮下脂肪厚度與體脂肪含量呈正相關,可做為減重後體脂肪是否減少之一項指標。在熱量代謝方面,不同肥胖程度的休息狀態下之熱量代謝速率(RMR),肥胖者大於正常體重者,但每公斤瘦体組織的熱量代謝速率(RMR/FFM)在正常體重組、輕度及中度肥胖三組間則沒有顯著差異。而每公斤體重之熱量代謝速率(RMR/BW),肥胖組顯著低於正常體重組,顯示代謝活性較大之瘦體組織雖然隨體重上升而增加,但肥胖者瘦體組織所佔體重百分比仍較正常體重者低,因此肥胖者之熱量代謝速率相對於正常體重者是屬於能量代謝低下的。減重後由於瘦體組織及脂肪組織亦相對降低,RMR亦會隨之下降,故肥胖者體重若要持續下降熱量攝取可能需再降低。本實驗在減重後雖然瘦體組織明顯減少,但由尿液肌酸酐和3-甲基組胺酸之排出量並未顯示減重後肌肉組織有明顯流失之情形。 |
英文摘要 | Following the rapid economic progress in Taiwan, the prevalence of overweight increases in recent years. Although most obese people are willing to lose weight, weight relapse is common in the obese population. Regulation of energy metabolism is an important factor in body weight control. Studies on the comparison of energy metabolism before and after weight reduction for domestic people are rare. The aim of this study was to investigate the differences of anthropometry, body composition and energy metabolism between obese and nonobese women. Besides, the changes of these parameters before and after weight reduction were also studied. Sixty-seven premenopausal obese women were recruited into the study, and consequently divided into mildly obese group with their body mass index (BMI) ranged from 26.4 to 30.7, and moderately obese group with BMI over 30.8. All obese women were kept on low calorie diet for half an year. Twenty-nine women reduced weight for more than 5% of their initial body weight. Eighteen age matched women of normal weight served as control. The results revealed that, triceps skinfold thickness (TSF), mid arm muscle circumference (MAMC), fat mass (FM), and fat free mass (FFM) increased in accordance with BMI. After weight reduction, all the anthropometric measurements in obese women decreased significantly. TSF was positively correlated with fat mass. Decrease of TSF after weight loss, therefore, can be used as an indicator of reduction of body fat mass. The absolute resting metabolic rate (RMR) was significantly higher in the obese than in the nonobese women, however, no difference in the RMR/FFM ratio was seen among all groups. RMR/body weight ratio was significantly lower in the moderately obese group than in the nonobese group. These results indicated that, although metabolically active FFM increased in parallel with body weight, the percentage of FFM in obese women was relatively low in same level of body weight, so that obese women were relatively hypometabolic as compared to nonobese women. RMR decreased after weight loss with the reduction of FFM and FM. This might be responsible for the failure to maintain a constant weight loss and weight relapse of obese subjects. No difference was observed in urinary creatinine and 3-methyhistidine excretion before and after weight reduction, this result suggests that muscle depletion was not obvious in the obese women under the resent experimental condition. |
本系統中英文摘要資訊取自各篇刊載內容。