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At least 613 records · Page 34Linked to original sources
PubMed2004

[Effect of an obesity management program on body weight, body mass index and physiological index of high school girl students].

PURPOSE: This study was to examine the effect of an obesity management program on the body weight, body-mass index, and physiological index of obese female high school students. METHOD: Students from one school were selected as the experimental group, and students from another school as a control group so the latter group wasn't exposed to the experiment. The experimental group and the control group were each organized with 20 students. The experimental group received 60 minutes of behavior modification once a week, for eight weeks. RESULT: The Body weight, and Body mass-Index of the experimental group significantly decreased after the obesity management program. Total-cholesterol, T-G, and LDL-C significantly decreased and HDL-C increased in the experimental group. Total-cholesterol, T-G, LDL-C and HDL-C between the experimental group and control group showed significant differences. CONCLUSION: These results indicate that the obesity management program had a great effect on decreasing the body weight and body-mass index of the female obese high school students, normalizing their physiological index. In conclusion, this program turned out to be one of the safest and most effective obesity-management methods that could be applied to female high school students.

Adolescent↗
PubMed2005

Physical exercise, body mass index, subcutaneous adiposity and body composition among Bengalee boys aged 10-17 years of Kolkata, India.

A comparative study of 215 sedentary (no regular physical exercise undertaken) and 313 physically active (regular physical exercise undertaken) Bengalee boys aged 10-17 years was undertaken to investigate the differences in overall adiposity (body mass index), subcutaneous adiposity (skinfolds) and body composition (percent body fat, fat mass and fat mass index). Both groups had a similar age. The results revealed that boys who did not undertake regular physical exercise (NPE) had a significantly greater mean body mass index (BMI) compared with those who undertook regular physical exercise (PE); p < 0.001. The means for all the skinfolds as well as percent body fat (PBF), fat mass (FM) and fat mass index (FMI) were significantly higher among the NPE group. The percentile distributions of all these variables and indices were consistently higher among the NPE group. The results of ANOVA of physical exercise (PE = yes, NPE = no) and PBF, FM and FMI, with age as covariate, revealed that PE had a significant negative effect on all these measures of body composition even after controlling for the impact of age. The means in each case were greater among the NPE group. In conclusion, this study provided evidence that Bengalee boys, who undertook regular physical exercise, had significantly less adiposity compared with those who did not undertake regular physical exercise.

Adolescent↗
PubMed1991

Body composition in ballet dancers measured by total body electrical conductivity.

The purpose of this study was to describe the body composition of adolescent and young adult ballet dancers using total body electrical conductivity (TOBEC). We studied 112 female and 33 male dancers. The mean ages were 15.0 +/- 2.0 and 18.7 +/- 3.1 yr for females and males, respectively. The mean percent body fat (PBF) values were 20.1 +/- 3.6% for the females and 14.5 +/- 4.2% for the males. Age and pubertal development were not significantly related to PBF in the females. Age and pubertal status were significantly inversely related to PBF in the males. There was no difference in dance history, percent body fat, and abdominal/hip or waist/hip ratios in eumenorrheic vs amenorrheic dancers. Estimated calorie intake indicated that dancers with menstrual abnormalities had lower calorie intake than those with normal menses. This is the largest group of ballet dancers whose body composition has been studied. Our PBF measurements are higher than in previous reports using hydrodensitometry, which may have underestimated body fat by not accounting for the increased bone density in the lower extremities of dancers. Our data suggest that previous measurements of PBF in dancers are underestimates; these new data challenge our concept of PBF values in dancers.

Adipose Tissue↗
PubMed1989

Is an adaptation of Siri's formula for the calculation of body fat percentage from body density in the elderly necessary?

Using data from the literature on changes in the mineral content, muscle mass and the amount of water in the body during aging, the age-related changes in the chemical composition of the fat-free mass have been calculated. In men the decrease in minerals (bone loss) during aging equals the decrease in protein and water (muscle) in the fat-free mass. As a consequence the chemical composition of the fat-free mass is hardly affected by aging in men. In women, however, the loss of minerals during aging is considerably higher than the decrease in protein and water in the fat-free mass. As a consequence the change in the chemical composition of the fat-free mass in females is remarkable, and therefore in females, the density (kg/l) of the fat-free mass decreases with age. Consequently the body fat percentage calculated from body density with Siri's equation overestimates the real body fat percentage by 2-3 per cent, depending on age. Based on the calculated chemical composition of the fat-free mass at several ages, and its calculated theoretical density, Siri's equation has been adapted. In females but not in men the adapted formulas give a more valid estimate of the body fat percentage calculated from body density compared to Siri's formula.

Adipose Tissue↗
PubMed1985

Effect of acute exposure to reduced atmospheric pressures on body weight, food intake and body composition of growing rats.

Growing male rats were exposed to simulated altitudes of 1850, 2900, 4100, 5450 or 7100 m in a hypobaric chamber to determine the effects of altitude on body weight gain and food intake as function of time of exposure. Female rats were exposed to a simulated altitude of 7100 m for 24 h to determine the effect of altitude on body composition. The results obtained indicate that in growing rats exposed to acute simulated altitude the initial body weight loss and the depressed growth rate, on one hand, and the reduced food intake, on the other hand, are related to the degree of the altitude; the parameters are not affected at altitudes below 1 850 m; the initial weight loss is not solely due to reduction in food intake, the additional loss being attributed to the added stress of hypoxia; the body weight loss occurs without marked alterations in body composition, although a tendency to dehydration exists; and the body compositional changes are the reflection of the altitude-induced hypophagia.

Altitude↗
PubMed1985

Variations in the size of the human brain. Influence of age, sex, body length, body mass index, alcoholism, Alzheimer changes, and cerebral atherosclerosis.

The various factors which determine brain weight and volume of the lateral ventricles were studied in an autopsy material of 467 cases. The material consisted of 64 men and 17 women between 45-54 years and 196 men and 190 women between 70-79 years. The weights of the cerebral hemispheres and of the cerebellum and brainstem were determined separately. The volume of the lateral ventricles was determined by weighing the hemispheres with and without water in the lateral ventricles. The recorded variables were age, sex, body length, body weight, cerebral atherosclerosis, Alzheimer changes and alcoholism. Cerebral atherosclerosis and Alzheimer changes were quantitated by morphometric methods. The results were analysed by conventional and multivariate statistical methods. The following observations were made: In normal brains there was a significant correlation between the weight of the supra- and infratentorial parts. Similarly, there was a significant correlation between the size of the lateral ventricles and the weight of the cerebral hemispheres. Women had smaller brains than men even when the difference in body length was taken into account. The difference was approximately 110-115 g for the whole brain after correction for other variables. Women had also smaller lateral ventricles than men, but this difference was in proportion to the smaller size of their hemispheres. There was a physiologic decline in brain weight and a widening of the lateral ventricles with increasing age. This shrinkage probably started after the age of 55. There was a clear correlation between body length and brain weight. The estimated increase in brain weight was approximately 3 g per cm body length. There was a decreasing brain weight and an increasing ventricular size with a decreasing body mass index. This shows that emaciation leads to a decrease in brain size. Severe Alzheimer changes caused a statistically significant enlargement of the lateral ventricles both in men and women. There was a general trend for brain weight reduction in cases with severe Alzheimer changes but the decrease was statistically significant only in old women, and it could not be entirely excluded that the weight reduction in part was due to a concurrent emaciation rather than to the Alzheimer changes per se. In the majority of the cases, the Alzheimer changes were mild and had probably progressed slowly with age. A few cases had very severe changes.(ABSTRACT TRUNCATED AT 400 WORDS)

Adolescent↗
PubMed1993

Reduction of body mass and change in body composition on a very low calorie diet.

The quality of weight loss was estimated during a very low calorie diet (VLCD) weight-reducing regime by determining the body composition every second week using near-infra-red interactance (NII). The study was performed on 127 overweight volunteers, aged 18-72 years, who, for eight consecutive weeks, used a VLCD to lose weight. Mean weight reduction was 12.7 kg (12.6% of initial weight). Mean body fat (BF) loss was 9.5 kg (23.8% of initial BF), which constitutes 75% of the weight loss. Mean reduction in lean body mass (LBM) was 3.2 kg (5.2% of initial LBM). We found no correlation between initial body mass index (BMI) and loss of LBM, or between initial body composition and weight loss. Weight reduction observed in this study is mainly due to reduction in body fat, and the loss of LBM is considered not to be larger than acceptable.

Adolescent↗
PubMed1997

[Evaluation by bioelectric impedance of body fluid compartments and body mass in cardiosurgical patients before and after total cardiopulmonary bypass].

BACKGROUND: To evaluate the influence of extracorporeal circulation (ECC) on fluid compartments and body mass using impedance measurements. METHODS: A prospective study was performed in 20 consecutive patients undergoing ECC during heart surgery at the Department of Heart Surgery of Verona Hospital. Resistance or reactance measurements at 1-5-10-50-100 KHz were performed in 20 patients undergoing heart surgery for valvular or coronary pathologies in class NYHA I or II, preoperatively and on day 1, 3 and 6 in order to evaluate total body water (TBW), intracellular water (ICW), extracellular water (ECW), thin and fat body mass. Weight, fluid-electrolytic balance and hematochemical parameters relating to electrochemical phenomena and the distribution of volumes in the various compartments, namely sodium, potassium and plasmatic osmolarity, were measured at the same times. Comparisons were made both between the data and during ECC. RESULTS: It was found that there was a mean postoperative weight gain of 2 kg in terms of total body water. Subsequently, this finding tended to decrease to basal values by day 6. Immediately after ECC, the water gain appeared to be predominantly extracellular, whereas the intracellular increase peaked on day 1. The change in total body water was correlated with the weight and fluid balance, but electrical measurements showed values above the corresponding weight gain. The duration of ECC was significantly correlated with bioelectric parameters, but not with absolute weight values. CONCLUSIONS: The method proved useful for the purpose, especially with regard to the overall population examined rather than individual patients. The dual-compartment electric model appears to be more suitable than the single-compartment model for exploring the different compartments. The trend of weight and total body water, which were correlated in pattern but not in absolute values, may be interpreted as a redistribution of fluids, also suggested by changes in electric parameters relating to compartmental distribution.

Aged↗
PubMed2002

Comparison of three-dimensional anthropometric body surface scanning to waist-hip ratio and body mass index in correlation with metabolic risk factors.

In this study, we used a three-dimensional (3D) body scanner to evaluate subjects with central obesity. These measurements were correlated with blood pressure, blood glucose, lipid, and uric acid levels. We randomly selected 1,204 subjects who visited the Department of Health Management at Chang Gung Medical Center in Linkou. The health index (HI) was calculated as HI = (body weight x 2 x waist profile area)/[body height(2) x (breast profile area + hip profile area)]. Among the 1,204 subjects, body mass index (BMI) equal to or greater than 30 kg/m(2) was found in 8.3% of the subjects. Pearson correlation coefficient studies revealed that HI was a better index for correlating metabolic parameters than BMI and waist-to-hips girth ratio. Of the 1,204 subjects, 9.5% (114) had diabetes mellitus, according to American Diabetes Association criteria. The percentages of men and women with total cholesterol greater than or equal to 245 mg/dL were almost the same (11.0% vs. 11.1%). Elevated low-density lipoprotein (> or =130 mg/dL) was found in 36.9% (444) of subjects. In conclusion, HI as determined by 3D scanning, is another method to predict these metabolic abnormalities. Further prospective long-term follow-up study is needed to determine the relationships of 3D body scanning data and HI to blood pressure, blood glucose, lipid, and uric acid levels.

Adult↗
PubMed2006

Anthropometric measures, body composition, body fat distribution, and knee osteoarthritis in women.

OBJECTIVE: Increased BMI is a well-recognized risk factor for radiographic knee osteoarthritis (rKOA); however, the contributions of the components of body composition, body fat distribution, and height to this association are not clear. RESEARCH METHODS AND PROCEDURES: We examined 779 women > or = 45 years of age from the Johnston County Osteoarthritis Project. Body composition was assessed using DXA, and rKOA was defined as Kellgren-Lawrence grade > or = 2. Logistic regression models examined the association between rKOA and the fourth compared with the first quartiles of anthropometric, body composition, and fat distribution measures adjusting for age, ethnicity, and prior knee injury. RESULTS: The adjusted odds ratios and 95% confidence interval of BMI and weight were 5.27 (3.05, 9.13) and 5.28 (3.05, 9.16), respectively. In separate models, higher odds of rKOA were also found for fat mass [4.54 (2.68, 7.69)], percent fat mass [3.84 (2.26, 6.54)], lean mass [3.94 (2.22, 6.97)], and waist circumference [4.15 (2.45, 7.02)]. Waist-to-hip ratio was not associated with rKOA [1.45 (0.86, 2.43)], and percent lean mass was associated with lower odds [0.20 (0.11, 0.35)]. Taller women had higher odds of rKOA after adjustment for BMI [1.77 (1.05, 3.00)]. DISCUSSION: This study confirms that BMI and weight are strongly associated with rKOA in women and suggests that precise measurements of body composition and measures of fat distribution may offer no advantage over the more simple measures of BMI or weight in assessment of risk of rKOA.

Absorptiometry, Photon↗
PubMed1994

The influence of body fat content and bone diameter measurements on body dissatisfaction in adult women.

This study investigated the simultaneous influence of various anthropometric factors on body dissatisfaction in adult women while controlling for psychological and behavioral factors known to covary with it. Multiple regression analyses confirmed that neuroticism, skeletal frame size, and percent body fat were positively, and age and physical activity inversely, related to dissatisfaction. Subsequent analyses substituted separate bone diameter measurements in place of the composite frame size variable and found that hip diameter, correcting for fatness, was a more salient factor in the determination of body dissatisfaction than the more general estimate of frame size. In pursuit of the perfect ultra-slender body women are encouraged to diet and exercise for weight loss more than ever before. It appears, however, that anatomical factors that are resistant to change by caloric restriction or physical activity, are a significant influence in the degree to which women report discontent with their body shape.

Adolescent↗
PubMed1975

Body composition in control, alcoholic and depressive individuals using a multiple isotope technique and whole body counting of potassium.

(1) Height, weight, total body potassium, exchangeable sodium, bromide space, total body water and concentrations of sodium, potassium and chloride in plasma were measured in control subjects and individuals suffering from alcoholism, with techniques which included body counting and a multiple isotope method using 24Na, 82Br and 3H2O. (2) No differences were found between control and alcoholic subjects so there was no evidence that chronic alcoholism altered body composition. In particular there was no eficence of cellular damage or loss which would have been reflected in changes in KT or KIN. (3) The data were combined and were analysed to give information on the relationships of the variates. (4) On-going work by the author on tryptophan metabolism in primary alcoholics is compared to Shaw's findings on the kinetic behaviour of tryptophan in affective disorder. The possible prophylactic value of L-tryptophan (Optimax) in preventing both recurrent depression and recurrent alcohol abuse is outlined. (5) Data on body composition in normal subjects not hitherto available in the literature is provided.

Adult↗
PubMed1995

The effects of weight reduction to ideal body weight on body fat distribution.

Obesity is a well-known health risk factor. Several studies have demonstrated that upper-body fat distribution plays a major role in the association between increased adiposity and metabolic disorders. The present study was undertaken to evaluate changes in intraabdominal and subcutaneous fat areas in obese subjects undergoing a weight reduction to their ideal body weight (IBW), as defined by a body mass index (BMI) no greater than 21 or body fat less than 30%, and compare the fat distribution at IBW with that of never-obese control subjects. We studied 33 obese women (151% +/- 1% of IBW; BMI, 31.6 +/- 2.5 [mean +/- SE]) before and after weight loss and a control group of 16 never-obese women (101.0% +/- 1.0% of IBW; BMI, 21.2 +/- 1.1). Eighteen obese women successfully achieved and stabilized at IBW for at least 2 months. Nonsuccessful obese subjects were significantly younger than reduced-weight subjects, but other physical characteristics were similar. In obese, reduced-obese, and never-obese groups, weight was 85 +/- 2.0, 62 +/- 1, and 58 +/- 1 kg; percent body fat was 41% +/- 1%, 24% +/- 2%, and 23% +/- 1%; intraabdominal fat area was 82 +/- 5, 28 +/- 3, and 25 +/- 4 cm2; waist subcutaneous fat area was 275 +/- 15, 120 +/- 9, and 81 +/- 7 cm2; hip subcutaneous fat area was 416 +/- 17, 204 +/- 10, and 195 +/- 7 cm2; and waist to hip ratio (WHR) was 0.84 +/- 0.02, 0.77 +/- 0.01, and 0.73 +/- 0.01, respectively.(ABSTRACT TRUNCATED AT 250 WORDS)

Adipose Tissue↗
PubMed1977

Prediction of body density and lean body weight in females 25 to 37 years old.

Sixty-one physically inactive females (ages 25 to 37 years) underwent hydrostatic weighing to determine body density (Db). A series of anthropometric measures were also obtained and were used to develop multiple regression equations for the prediction of (Db) and lean body weight (LBW). The anthropometric variables were also used to determine the prediction accuracy of several previously published regression equations. Mean Db was 1.0405 +/- 0.0131 g/ml, relative fat, 25.1 +/- 5.55%, and LBW, 42.14 +/- 4.64 KG. Percentage of body fat was calculated from Db using the formula of Brozek er al. (Am. N.Y. Acad. Med. 110: 113, 1963). Higher correlations were obtained between actual and predicted LBW (R = 0.66 to 0.82). The best regression equation was found to be one using a combination of body weight, one skinfold, and four circumferences. When selected multiple regression equations developed by other authors were used to predict the Db and LBW of the present subjects, the actual values were both over- and underestimated, and correlations between measured and predicted values were lower. It was concluded that even though the body composition of these women was similar to that of college-age women, different regression equations are needed for accurately predicting their Db and LBW.

Adult↗
PubMed1982

Total body water and total body potassium in patients with continent ileostomies.

Total body water and total body potassium were studied in 14 patients submitted to proctocolectomy six to 10 years after they had been provided with a continent ileostomy. Total body water was determined with an isotope dilution technique using tritiated water as a tracer. Total body potassium was determined by counting the gamma radiation from the naturally present nuclid 40K in a total body counter. The results were compared with 'normal values' produced by multiple regression analysis of data from 476 healthy controls which had been published earlier from the same laboratory. The investigations showed no signs of water or potassium depletion in patients with continent ileostomies.

Adult↗
PubMed1997

Divergent selection for heat loss in mice: II. Correlated responses in feed intake, body mass, body composition, and number born through fifteen generations.

Divergent selection for heat loss (kcal.kg-.75.d-1), measured in 9- to 11-wk-old male mice, was conducted for 15 generations. Selection for high (MH) and low (ML) heat loss and unselected control (MC) occurred in each of three replicates for a total of nine unique lines. Feed intake in males was measured during Generations 9 through 15. Body mass at commencement of mating in females and at time of measurement of heat loss in males was recorded. Body fat percentage at 12 wk for animals of Generations 6, 10, and 14 was predicted as a function of electrical conductivity and body mass. Litter size was recorded for all generations, and components of litter size were evaluated at Generation 11 in one replicate and Generation 12 in the other two replicates. Feed intake changed in the same direction as heat loss for the MH and ML selections; at Generation 15, the difference between MH and ML (P < .002) was 20.6% of the MC mean. Body mass did not change with selection for heat loss. Differences in body fat percentage were not significant in earlier generations, but at Generation 14, MH and ML were significantly (P < .01) different with MH mice having the lowest fat percentage; MC was intermediate. Selection had a significant (MH vs ML; P < .01) effect on litter size, causing an increase in MH and a decrease in ML. This difference was explained by a difference (P < .01) in ovulation rate. There was no asymmetry of response in feed intake, fatness, litter size, or number of ovulations.

Animals↗
PubMed1980

[The components of body weight in pregnant women determined by electrical impedance measurements of the whole body (author's transl)].

For a long time estimating body weight has not been the sole parameter of knowledge of the body constituents and the method of measuring "skin folds" only was of value in differentiating between the "thin mass" and the "fat mass". The authors used Thomasset's method of determination of body fluid compartments by electrical impedance measurements to measure objectively the extra-cellular water content and the total water content, which means the thin mass and the fat mass of the body. It is possible in pregnancy to work out how much of the increase in weight comes from the maternal structures and how much from the utero-fetal mass. The authors point out that the impedance method makes it possible to determine independently the maternal body constituents and those of the fetus carried by the mother. In this way it is easy to work out in cases of pathological weight gain whether this has arisen because of oedema or because of becoming fat. Furthermore the authors point out that what they call "eutrophy of pregnancy", which is the normal weight gain brought about by pregnancy, is similar to the state of affairs brought about by women taking oral contraceptives, which they call "oestroprogestative eutrophy".

Body Composition↗
PubMed1996

The reallocation of body fat toward the abdomen persists to very old age, while body mass index declines after middle age in Chinese.

OBJECTIVES: Age-specific distributions of several anthropometric measurements were examined to elucidate age-associated changes. DESIGN: Community-based cross-sectional analysis, which was performed on anthropometric data collected from members of 2769 families from November 1991 to September 1993. SUBJECTS: 2776 Chinese men and 3176 non-pregnant Chinese women. MEASUREMENTS: Age-specific values of several obesity indices, including a general obesity index (body mass index) and obesity indices at various parts of the body, including waist-to-hip ratio, waist circumference, hip circumference, arm circumference, triceps skinfold thickness and subscapular skinfold thickness. RESULTS: The age-specific percentile values of weight, body mass index, arm circumference, triceps skinfold thickness, subscapular skinfold thickness and hip circumference showed a gradual increase with age up to middle age, but a decline subsequently. This 'up and then down' phenomenon occurred later in women than in men. On the other hand, age-specific percentile values of waist circumference and waist-to-hip ratio showed a steady increase with age from early life. CONCLUSIONS: These data indicate that, in very old age, a greater amount of fat tends to accumulate in the abdominal region compared to the deposition in the younger age groups. This occurs despite a decrease in body weight and body mass index after middle age.

Abdomen↗