| Summary: | 碩士 === 中山醫學大學 === 營養科學研究所 === 90 === ABSTRACT
The purpose of the study was to compare the effects of introducing diet at different stage of weight loss treatment on the outcome of weight loss, body composition and metabolic rate change. Twenty-seven subjects were divided randomly into 2 groups： Group A（n = 13, mean age: 39y.o, mean BMI: 27.7）, Group B（n = 14, mean age: 41y.o, BMI: 26.4）.The subjects in group A were treated diet restriction（calories was based on measured RMR ×1.3 - 500）plus exercises（aerobic＋resistance weight training）for the entire 12 weeks. The subjects in group B were provided adequate calories（RMR ×1.3）plus exercises （aerobic＋resistance weight training） for the first 4 weeks and diet restriction（RMR ×1.3 - 500）＋exercise for next 8 weeks. The weight loss in kilogram, body composition and resting metabolic rate were measured at begin, the 4th、the 8th week and the 12th week of the study. Both groups showed significant decrease in body weight（-6.9 %, -7.9 % for group A and B, respectively）、fat mass（-12.1 %, -18.2 % for group A and B, respectively）、LBM（-5.1 %, -2.8 % for group A and B, respectively）, however, there was no significant difference found in between groups. The percentage of change in RMR、RMR/kg.BW、RMR/kg.LBM were shown significantly increased in group B and decreased in group A（p＜0.05）.In this study, we found that introducing energy restriction at later stage of weight loss treatment may have benefits in preserving lean body mass and metabolic rate, and in the long term observation, it may have better result of weight loss when compare with introducing energy restriction and exercise together at the begin of weight loss treatment.
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