CHANGES IN THE GROSS CHEMICAL COMPOSITION OF THE MOUSE DURING GROWTH IN RELATION TO THE ASSESSMENT OF PHYSIOLOGICAL AGE

1960 ◽  
Vol 40 (2) ◽  
pp. 143-155 ◽  
Author(s):  
C. B. Bailey ◽  
W. D. Kitts ◽  
A. J. Wood
Keyword(s):  
Body Composition ◽  
Body Weight ◽  
Fundamental Property ◽  
The Body ◽  
Physiological Age ◽  
Differential Growth ◽  
Free Weight ◽  
Free Body ◽  
Water Ratio ◽  
Gross Chemical Composition

The body composition of 111 male white mice in terms of protein, water, fat and ash was determined. On the average, the protein, water and ash fractions appeared to exhibit differential growth with respect to the body weight and to the fat-free weight. The concentration of fat in the body was extremely variable and presumably reflected nutritive condition. The regularity of the average changes in the composition of the fat-free body appeared to be a fundamental property of the growth of mice, the percentage of water decreasing and of protein and ash increasing as growth proceeds. A new index of physiological age, the protein to water ratio, is suggested and evidence for its usefulness is presented.

scholarly journals Composition of the human foetus

1972 ◽  
Vol 27 (2) ◽  
pp. 305-312 ◽  
Author(s):  
Sharad V. Apte ◽  
Leela Iyengar
Keyword(s):  
Body Composition ◽  
Body Weight ◽  
Gestational Age ◽  
Maternal Nutrition ◽  
The Body ◽  
Human Foetus ◽  
Free Weight ◽  
Body Weights ◽  
Calcium Phosphorus ◽  
Ca:P Ratio

1. The body composition was determined of forty-one fetuses of different gestational ages born to mothers belonging to a low socio-economic group of the population.2. With increasing gestational age the water content fell from 88% at 28 weeks to 76% at term; the fat content increased from 2.1% to 11.2% and the protein content increased from 6.9 to 9.3%.3. The changes in body composition were more closely related to body-weight than to gestational age.4. The calcium, Phosphorus and magnesium contents of the body per unit fat-free weight progressively increased with gestational age, and at term the values appeared to be considerably lower than those reported in the literature. The Ca:P ratio was constant at different body-weights.5. The body iron content per unit of fat-free weight increased marginally with increasing gestational age. The value was almost 30% lower than the values reported from elsewhere.6. It is suggested that chemical composition and nutrient stores of the developing foetus can be considerably influenced by the state of maternal nutrition.

THE GROSS BODY COMPOSITION OF SIX GEOGRAPHIC RACES OF PEROMYSCUS

1965 ◽  
Vol 43 (2) ◽  
pp. 297-308 ◽  
Author(s):  
J. S. Hayward
Keyword(s):  
Body Composition ◽  
Body Weight ◽  
Body Fat ◽  
Comparative Studies ◽  
The Body ◽  
Deer Mice ◽  
Body Protein ◽  
Free Body ◽  
Laboratory Acclimation ◽  
Seasonal Extremes

The body composition in terms of fat, water, and protein has been determined for 115 deer mice (genus Peromyscus) of six racial stocks. The changes in composition that are characteristic of seasonal extremes and that accompany laboratory acclimation are presented. The composition of the fat-free body exhibits the constancy which has been found in other mammals. Body protein averaged 22.97% and body water 69.71% of the fat-free body weight. Body fat levels are shown to vary considerably among individuals and races. The highest fat levels occurred in the desert-adapted race (P. m. sonoriensis). The importance of considering body composition in comparative studies of metabolic rate is discussed.

The body composition and herbage utilization of grazing Merino and crossbred lambs during periods of growth and summer undernutrition

1970 ◽  
Vol 21 (2) ◽  
pp. 261 ◽  
Author(s):  
WG Allden
Keyword(s):  
Body Composition ◽  
Body Weight ◽  
The Body ◽  
Metabolizable Energy ◽  
Summer Drought ◽  
Drought Period ◽  
Body Protein ◽  
Relative Growth Rates ◽  
Free Body ◽  
Body Energy

A grazing study was undertaken (i) to determine the changes in body energy and body composition of Merino and Dorset Horn x Merino lambs during their first year of life with the object of assessing the nature of body tissue reserves during periods of summer undernutrition, and (ii) to examine the nutritional basis of growth differences between the two genotypes in terms of herbage intake and feed utilization for weight gain. The relations between body weight and (i) total body energy, (ii) body protein, (iii) body fat, and (iv) body water were of linear form and similar for both groups. Each 1 kg of wool-free body weight increment by the unfasted grazing animal was associated with the retention of 3.17 megacalories (mcal) of body energy, whereas on an empty body weight basis 1 kg gain was associated with the retention of 4.18 mcal. Empty body weight was no better a predictor of body energy than the unfasted wool-free body weight of the grazing sheep; by either method more than 97% of the variance in body energy could be accounted for by differences in body weight. Dorset Horn x Merino lambs were significantly heavier at birth (4 5 v. 3.5 kg). They grew more rapidly than the Merinos throughout the 300 day experiment although during the first 200 days relative growth rates were similar. The intake of digestible energy WE) of the two groups was estimated for 112 days from weaning at c. 7 weeks. During this period the crossbreds weighed 20-23 % more than the Merinos; they consumed 23 % more herbage at the beginning and 11 % more at the end (P < 0.01). The efficiency of energy retention was similar for both breeds, 42.5 % of metabolizable energy above the maintenance being stored as wool-free body energy. During the summer drought period the crossbreds used their feed more efficiently than the Merinos; they consumed up to 25 % less feed per kilogram weight and at the same time increased their weight advantage. Differences in body weight underestimated differences in body energy. Crossbreds weighed 30% more than the Merinos at the beginning of the summer drought period, and 36 % more at the end. Corresponding differences for body energy were 40 and 53 %. There was no evidence to suggest that prolonged periods of arrested growth influenced the composition of the body at a given weight.

Body Composition Modifications Due to the “Search, Rescue and Survival Training” in Male Military Firefighter Cadets

2021 ◽  
Author(s):  
Thiago Ramos de Barros ◽  
Verônica Pinto Salerno ◽  
Thalita Ponce ◽  
Míriam Raquel Meira Mainenti
Keyword(s):  
Body Composition ◽  
Body Weight ◽  
Repeated Measures ◽  
Food Restriction ◽  
Physical Exertion ◽  
High Energy ◽  
The Body ◽  
Fat Free Mass ◽  
Sleep Restriction ◽  
Fat Percentage

ABSTRACT Introduction To train and prepare cadets for a career as firefighters in Rio de Janeiro, the second-year students of the Officers Training Course are submitted to a Search, Rescue, and Survival Training (SRST) course, which is characterized by long periods of high physical exertion and sleep restriction during a 9-day instruction module, and food restriction during a 7-day survival module. The present study investigated changes in the body composition of 39 male cadets submitted to SRST during training and 4 weeks of recovery with no restrictions in food consumption. Materials and Methods Each cadet was evaluated by anthropometric measurements at six time points: pre-SRST; after the first module; after the second module; and after 1, 2, and 4 weeks of recovery. Measurements included body girths and skinfolds, to estimate trunk (chest and waist) and limbs (arm and thigh) dimensions, as well as body composition. Repeated measures ANOVA and Friedman test were applied (depending on each data distribution). Results Statistically significant decreases in body weight (76.2; 69.8-87.2 to 63.9; 58.9-73.5 kg) and fat free mass (FFM, 69.2; 63.7-77.2 to 60.1; 56.2-68.0 kg) were observed following the second module of SRST. Following a single week of recovery, the FFM returned to pre-SRST values. Body weight returned to pre-training levels in 2 weeks. Body fat percentage and mass also significantly decreased during SRST (9.0; 7.7-12.3 to 6.5; 5.1-9.3% and 6.9; 5.6-10.0 to 6.9; 5.6-10.0 kg, respectively), which showed a slower and more gradual recovery that reached pre-SRST values after 4 weeks. The girths of arm, thigh, chest and waist significantly decreased due to SRST. The girths of the limbs (arm and thigh) returned to pre-training values after one month of recovery, while the girths of the trunk (chest and waist) did not return to pre-SRST values during the study period. Conclusions The findings suggest that men who experience periods of high energy demands and sleep restriction followed by a period of food restriction will endure unavoidable physical consequences that can be mostly reversed by a 1-month recovery.

scholarly journals Cardiorespiratory Fitness and Diet Quality Profile of the Lithuanian Team of Deaf Women’s Basketball Players

2020 ◽  
Vol 17 (18) ◽  
pp. 6749
Author(s):  
Marius Baranauskas ◽  
Valerija Jablonskienė ◽  
Jonas Algis Abaravičius ◽  
Rimantas Stukas
Keyword(s):  
Vitamin D ◽  
Body Composition ◽  
Body Weight ◽  
Cardiorespiratory Fitness ◽  
Female Athletes ◽  
The Body ◽  
Physical Working Capacity ◽  
Working Capacity ◽  
Women's Basketball ◽  
Basketball Team

There are about 466 million people with hearing impairments in the world. The scientific literature does not provide sufficient data on the actual nutrition and other variables of professional deaf athletes. The objectives of this study were to investigate and evaluate the body composition, the physical working capacity, the nutrition intake, and the blood parameters of iron and vitamin D in the Lithuanian high-performance deaf women’s basketball team players. The female athletes (n = 14) of the Lithuanian deaf basketball team aged 26.4 ± 4.5 years were recruited for an observational cross-sectional study. A 7-day food recall survey method was used to investigate their actual diet. The measurements of the body composition were performed using the BIA (bioelectrical impedance analysis) tetra-polar electrodes. In order to assess the cardiorespiratory and aerobic fitness levels of athletes, ergo-spirometry (on a cycle ergometer) was used to measure the peak oxygen uptake (VO2peak) and the physical working capacity at a heart rate of 170 beats per minute (PWC170). The athletes’ blood tests were taken to investigate the red blood cells, hemoglobin, 25-hydroxyvitamin D, ferritin, transferrin, iron concentrations, and total iron-binding capacity (TIBC). The consideration of the VO2peak (55.9 ± 6.1 mL/min/kg of body weight, 95% CI: 51.8, 58.9) and the low VO2peak (56–60 mL/min/kg of body weight) (p = 0.966) in the deaf women’s basketball team players revealed no differences. For the deaf female athletes, the PWC170 was equal to 20.3 ± 2.0 kgm/min/kg of body weight and represented only the average aerobic fitness level. The carbohydrate and protein intakes (5.0 ± 1.3 and 1.3 ± 0.3 g/kg of body weight, respectively) met only the minimum levels recommended for athletes. The fat content of the diet (38.1 ± 4.1% of energy intake) exceeded the maximum recommended content (35% of energy intake) (p = 0.012). The mean blood serum concentrations of 25(OH)D and ferritin (24.1 ± 6.6 nmol/L and 11.0 ± 4.1 µg/L, respectively) predicted vitamin D and iron deficits in athletes. Female athletes had an increased risk of vitamin D and iron deficiencies. Regardless of iron deficiency in the body, the better cardiorespiratory fitness of the deaf female athletes was essentially correlated with the higher skeletal muscle mass (in terms of size) (r = 0.61, p = 0.023), the lower percentage of body fat mass (r = −0.53, p = 0.049), and the reduced intake of fat (r = −0.57, p = 0.040).

Effect of Growth Rate on Mineral Retention and Body Composition of Growing Lambs

1988 ◽  
Vol 1988 ◽  
pp. 102-102 ◽  
Author(s):  
M Wan Zahari ◽  
J K Thompson ◽  
D Scott
Keyword(s):  
Growth Rate ◽  
Body Composition ◽  
Body Weight ◽  
Calcium Carbonate ◽  
Growth Rates ◽  
Fast Rate ◽  
Basal Diet ◽  
Primary Objective ◽  
The Body ◽  
Secondary Objective

The effects of plane of nutrition on the body composition of growing sheep are very apparent when animals are compared at the same age following different nutritional histories. These differences are, however, less obvious when animals of the same breed and sex are compared at the same body weight and at present there is some conjecture whether composition is affected by growth rate. This uncertainty is not limited to fat and protein but includes the bone and ash, fraction and the ash composition.The primary objective of this trial was to study the effects of different growth rates achieved by feeding different amounts of the same concentrate diet on the composition of empty-body gain and on the retention of minerals by growing lambs. A secondary objective was to examine the effect of adding supplementary calcium carbonate to the basal diet at the fast rate of growth.

Effect of exercise duration on feed intake and body composition of Swiss albino mice

1985 ◽  
Vol 58 (2) ◽  
pp. 500-505 ◽  
Author(s):  
R. Bulbulian ◽  
K. K. Grunewald ◽  
R. R. Haack
Keyword(s):  
Body Composition ◽  
Body Weight ◽  
Protein Content ◽  
Feed Intake ◽  
Exercise Duration ◽  
The Body ◽  
Control Group ◽  
Swiss Albino Mice ◽  
Daily Exercise ◽  
Albino Mice

The purpose of this study was to examine the effects of daily exercise of varying duration on the body composition, weight, and feed intake of mature Swiss albino mice. Fifty-four male mice were equally divided into a control group and five exercise groups (n = 9) performing 20, 40, 60, 120, and 240 min of daily exercise on a treadmill (7.2 m/min). Feed intake and body weight were measured weekly for 10 wk. At the completion of the study the mice were killed and the animal carcasses were chemically analyzed for fat, dry matter, and protein content. The results of this study demonstrate no differences in the body weight among groups (P less than 0.97) with all groups gaining 4.5–5.8 g during the 10-wk period. However, fat content decreased significantly from 15.7% in the control to 12.0% in the 120- and 240-min exercise groups (P less than 0.05). In contrast, protein content showed an insignificant rising trend from 13.0 to 14.6% with increasing duration of exercise. Feed intake showed a nonsignificant drop during the 20-min exercise treatment and remained unchanged among groups. These data show a slight but variable appetite-suppressing effect of light exercise in mice accompanied by favorable body composition changes even in the absence of differences in body weight. These findings suggest the mouse to be an acceptable experimental model for body composition and exercise studies.

scholarly journals Volume estimations for combined free-weight and rubber-band resistance exercise

Kinesiology ◽  
2017 ◽  
Vol 49 (2) ◽  
pp. 169-177 ◽  
Author(s):  
Todd C. Shoepe ◽  
Jeanette M. Ricci
Keyword(s):  
Body Weight ◽  
Resistance Exercise ◽  
Body Height ◽  
Theoretical Method ◽  
Rubber Band ◽  
The Body ◽  
Volume Estimation ◽  
Gravitational Acceleration ◽  
Volume Calculation ◽  
Free Weight

Volume, or the total work performed during resistance training is one of the vital variables of resistance exercise programming. The most common definition in use by practitioners is sets x reps x external weight. While appropriate for linear loading incurred through free-weight resistance exercise, this inadequately addresses the nonlinear loading incurred with rubber resistance, a relatively new loading technique. The purpose of this investigation was to derive a theoretical model to describe a method of volume calculation for rubber band plus free-weight exercise. Men (n=51; age 19.5±1.6 years; body height 1.76±0.07 meters; body weight 77.3±11.3 kilograms) and women participants (n=66; age 18.9±1.1 years; body height 1.65±0.07 meters; body weight 62.8±9.1 kilograms) were measured for band lengths incurred at: squat with knee extended position, squat with flexed position, and change in band length was then calculated. Significant gender differences were seen for band length change as a percentage of body height (p&lt;0.5) during the squat, which mandated separate volume equations (females=33.8%; males=35.3% of body height). Equations were determined for total external volume estimation in kgm=[0.338(m+2c2+(ln(h)-0.383)2c1)]/g and kgm=[0.352(m+2c2+(ln(h)-0.382)2c1)]/g for females and males, respectively, where m is the total external resistance, c2 and c1 are constants derived from rubber-band loading parameters, h is the body height of the participant, and g is gravitational acceleration. This work provides practitioners and researchers with a simple theoretical method for work estimation using participant’s body height to estimate displacement values during the squat exercise.

Assessment of body composition measure of bioelectrical impedance in patients operated for pancreatic, gastric and colorectal cancer

2020 ◽  
Vol 92 (1) ◽  
pp. 1-5
Author(s):  
Przemysław Dzierżek ◽  
Krzysztof Kurnol ◽  
Wojciech Hap ◽  
Ewelina Frejlich ◽  
Agata Diakun ◽  
...  
Keyword(s):  
Weight Loss ◽  
Body Composition ◽  
Body Weight ◽  
Bioelectrical Impedance ◽  
The Body ◽  
Intracellular Water ◽  
University Hospital ◽  
Major Surgery ◽  
Average Weight ◽  
Neoplastic Disease

Introduction An adequate level of nutrition is important in the period of reconvalescence in patients undergoing major surgery, in particular due to neoplastic disease. Bioelectrical impedance (BIA - Bioelectrical Impedance Analysis) is a widely used technique for assessing body composition. BIA measurement is easy, fast, cheap and repeatable. Material and methods The body composition of 56 patients (25 women and 31 men) was assessed with bioelectrical impedance analysys. All patients was hospitalized and operated in the Department of General and Oncological Surgery, Wrocław Clinical University Hospital in 2017-2018. Results The average weight loss on the 4th postoperative day is 1.32%, and at discharge from hospital 4.23% of body weight in relation to body weight at admission to the ward. The percentage of fat tissue (FM-Fatt Mass) in patients admitted to the ward is above the normal range. The change in body weight composition in hospitalized patients is mainly related to the amount of adipose tissue and the amount of extra- and intracellular water (ECW-Extracellular Water, ICW-Intracellular Water). Conclusions Bioelectrical impedance can be an easy and effective method to assess body composition and its change in patients undergoing major surgery. Patients operated on due to pancreatic cancer lose the highest percentage of body weight until discharge from the ward in relation to body weight at the time of admission to the ward from the analyzed groups. Weight loss mainly occurs as fat loss (FM).

Body composition of Romney-Southdown cross and Merino sheep foetuses at a constant age and a constant body weight

1964 ◽  
Vol 6 (3) ◽  
pp. 309-319 ◽  
Author(s):  
S. K. Stephenson
Keyword(s):  
Growth Rate ◽  
Body Composition ◽  
Body Weight ◽  
Muscle Tissue ◽  
Hind Limb ◽  
Body Shape ◽  
Carcass Composition ◽  
The Body ◽  
Merino Sheep ◽  
Australian Merino

1. Body shape and carcass composition have been measured in a dated series of Romney-Southdown cross and Australian Merino sheep foetuses.2. Large differences in shape exist between the two breed groups and these result from growth rate differences in certain components of the bone and muscle tissue.3. Carcass composition at any particular foetal weight, however, is more uniform. In relation to body weight, the Merino has a higher proportion of bone in the body but the proportion of muscle is the same in both breed groups. Nevertheless, the distribution of muscle tissue is changed as there s i a higher proportion of muscle in the hind limb of the Romney-Southdown cross.

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