Changes of body composition and energy metabolism in obese women before and after weight reduction

S. L. Yeh, M. Y. Liu, W. J. Chen

Research output: Contribution to journalArticle

Abstract

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 present experimental condition.

Original languageEnglish
Pages (from-to)133-145
Number of pages13
JournalNutritional Sciences Journal
Volume23
Issue number2
Publication statusPublished - 1998
Externally publishedYes

Fingerprint

Body Composition
energy metabolism
Energy Metabolism
body composition
Weight Loss
weight loss
Fats
Basal Metabolism
resting metabolic rate
lipids
Skinfold Thickness
Body Weight
skinfold thickness
Weights and Measures
body weight
body mass index
Body Mass Index
relapse
anthropometric measurements
Recurrence

Keywords

  • Body composition
  • Obesity
  • Resting metabolic rate
  • Weight reduction

ASJC Scopus subject areas

  • Food Science
  • Medicine (miscellaneous)

Cite this

Changes of body composition and energy metabolism in obese women before and after weight reduction. / Yeh, S. L.; Liu, M. Y.; Chen, W. J.

In: Nutritional Sciences Journal, Vol. 23, No. 2, 1998, p. 133-145.

Research output: Contribution to journalArticle

@article{9ceebdb655b64eed9979372c03af07ab,
title = "Changes of body composition and energy metabolism in obese women before and after weight reduction",
abstract = "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 present experimental condition.",
keywords = "Body composition, Obesity, Resting metabolic rate, Weight reduction",
author = "Yeh, {S. L.} and Liu, {M. Y.} and Chen, {W. J.}",
year = "1998",
language = "English",
volume = "23",
pages = "133--145",
journal = "Journal of the Chinese Nutrition Society",
issn = "1011-6958",
publisher = "臺灣營養學會",
number = "2",

}

TY - JOUR

T1 - Changes of body composition and energy metabolism in obese women before and after weight reduction

AU - Yeh, S. L.

AU - Liu, M. Y.

AU - Chen, W. J.

PY - 1998

Y1 - 1998

N2 - 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 present experimental condition.

AB - 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 present experimental condition.

KW - Body composition

KW - Obesity

KW - Resting metabolic rate

KW - Weight reduction

UR - http://www.scopus.com/inward/record.url?scp=0031686626&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031686626&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0031686626

VL - 23

SP - 133

EP - 145

JO - Journal of the Chinese Nutrition Society

JF - Journal of the Chinese Nutrition Society

SN - 1011-6958

IS - 2

ER -