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Total Energy Expenditure (total + energy_expenditure)
Selected AbstractsNorwegian adolescents with asthma are physical active and fit,ALLERGY, Issue 3 2009S. Berntsen Background:, Evidence regarding habitual physical activity levels and aerobic fitness of asthmatic compared to nonasthmatic children and adolescents is contradictory, and it is unclear if low physical activity levels can contribute to asthma development. The present study therefore aimed to determine whether adolescents with asthma have reduced physical activity levels and aerobic fitness, or increased energy intake and body fat compared to controls. Methods:, From the environment and childhood asthma study in Oslo, 174 (13- to 14-year old) adolescents, 95 (66 boys) with and 79 (41 boys) without asthma performed maximal running on a treadmill with oxygen consumption measurement (aerobic fitness) and had the sum of four skinfolds and waist circumference recorded (body fat), followed by wearing an activity monitor and registering diet for four consecutive days. Asthma was defined by at least two of the following three criteria fulfilled: (1) dyspnoea, chest tightness and/or wheezing; (2) a doctor's diagnosis of asthma; (3) use of asthma medication. Participants with asthma used their regular medications. Results:, Neither aerobic fitness, total energy expenditure nor hours in moderate to very vigorous intensity physical activity during week and weekend differed between adolescents with and without asthma. Energy intake and body fat was similar in both groups. Conclusions:, Total energy expenditure, aerobic fitness and hours in moderate to very vigorous intensity physical activity were not reduced and energy intake and body fat measured with skinfolds not increased among Norwegian adolescents with asthma. [source] Doubly labelled water for the measurement of total energy expenditure in man , progress and applications in the last decadeNUTRITION BULLETIN, Issue 2 2008L. J. C. Bluck Summary The doubly labelled water method for the measurement of total energy expenditure is a methodology that is still maturing. Over the last 10 years, the number of publications describing its exploitation in man has remained roughly constant, at a rate of about 50 per annum. During this time, the laboratory techniques used have become more refined, particularly in the measurement of deuterium enrichment. This article details the methodological advances which have been made and presents a brief review of some recent applications. [source] High-protein Weight-loss Diets: Are They Safe and Do They Work?NUTRITION REVIEWS, Issue 7 2002A Review of the Experimental, Epidemiologic Data Recommendations for increased consumption of protein are among the most common approaches of popular or fad diets. This review summarizes the effects of dietary protein on satiety, energy intake, thermogenesis, and weight loss, as well as its effect on a variety of health outcomes in adults. In short-term studies, dietary protein modulates energy intake via the sensation of satiety and increases total energy expenditure by increasing the thermic effect of feeding. Whereas these effects did not contribute to weight and fat loss in those studies in which energy intake was fixed, one ad libitum study does suggest that a high-protein diet results in a greater decrease in energy intake, and therefore greater weight and fat loss. In terms of safety, there is little long-term information on the health effects of high-protein diets. From the available data, however, it is evident that the consumption of protein greater than two to three times the U.S. Recommended Daily Allowance contributes to urinary calcium loss and may, in the long term, predispose to bone loss. Caution with these diets is recommended in those individuals who may be predisposed to nephrolithiasis or kidney disease, and particularly in those with diabetes mellitus. [source] Body size and human energy requirements: Reduced mass-specific total energy expenditure in tall adults,AMERICAN JOURNAL OF HUMAN BIOLOGY, Issue 3 2010Steven B. Heymsfield Mammalian resting energy expenditure (REE) increases as ,weight0.75 while mass-specific REE scales as ,weight,0.25. Energy needs for replacing resting losses are thus less relative to weight (W) in large compared with small mammals, a classic observation with biological implications. Human weight scales as ,height2 and tall adults thus have a greater weight than their short counterparts. However, it remains unknown if mass-specific energy requirements are less in tall adults; allometric models linking total energy expenditure (TEE) and weight with height (H) are lacking. We tested the hypothesis that mass-specific energy requirements scale inversely to height in adults by evaluating TEE (doubly labeled water) data collected by the National Academy of Sciences. Activity energy expenditure (AEE) was calculated from TEE, REE (indirect calorimetry), and estimated diet-induced energy expenditure. Main analyses focused on nonmorbidly obese subjects ,50 yrs of age with non-negative AEE values (n = 404), although results were directionally similar for all samples. Allometric models, including age as a covariate, revealed significantly (P < 0.05) greater REE, AEE, and TEE as a function of height (range H1.5,1.7) in both men and women. TEE/W scaled negatively to height (,H,0.7, P < 0.01) with predicted mass-specific TEE (kcal/kg/d) at ±2 SD for US height lower in tall compared with short men (40.3 vs. 46.5) and women (37.7 vs. 42.7). REE/W also scaled negatively to height in men (P < 0.001) and women (P < 0.01). Results were generally robust across several different analytic strategies. These observations reveal previously unforeseen associations between human stature and energy requirements that have implications for modeling efforts and provide new links to mammalian biology as a whole. Am. J. Hum. Biol. 2010. © 2009 Wiley-Liss, Inc. [source] Impact of seasonal scarcity on energy balance and body composition in peasant adolescents from Calakmul, Campeche MexicoAMERICAN JOURNAL OF HUMAN BIOLOGY, Issue 6 2007José A. Alayón Gamboa A time allocation and anthropometric study were performed on 46 male and 38 female adolescents from 16 peasant households from two different adaptive strategies in the municipio of Calakmul, Campeche Mexico to see if they could maintain energy balance during the annual scarcity season. These strategies were called: "household subsistence agricultural strategy" (HSA) and "household commercial agricultural strategy" (HCA). Each month, from June 2001 to May 2002, adolescents were measured and followed for 24 h. Their activities were recorded at 15 min intervals. Weight for age (W/A), height for age (H/A), body mass index (BMI), arm muscle area, arm fat area, total energy expenditure (TEE), activity energy expenditure (AEE), and basal metabolic rate (BMR) were estimated and the data compared between seasons using a repeated measurements analysis of variance. The results suggest that HCA offers their adolescents better buffering against seasonal scarcity, and that HSA males are better protected than females. HCA adolescents didn't show significant losses of weight, and HCA females lost body fat during the scarcity season. HSA vulnerability was observed in W/A and BMI z score reductions during the scarcity season. It also reflected itself in stunted adolescent males and adolescent females with fewer fat reserves. HSA adolescents reduced their BMR to down regulate their energy expenditure during the scarcity season without reducing TEE and physical activity levels. HSA females lost muscle mass during the scarcity season while HSA males didn't. This difference was associated with a more demanding work schedule throughout the year for females. Am. J. Hum. Biol., 2007. © 2007 Wiley-Liss, Inc. [source] Physical activity of poor urban women in Cali, Colombia: A comparison of working and not working womenAMERICAN JOURNAL OF HUMAN BIOLOGY, Issue 4 2003D.L. Dufour We have previously presented evidence that the physical activity level (PAL) and total energy expenditure (per kg body weight) of poor urban women who "work" (engage in income-earning activities) is similar to those who do not "work" (but do tend to household and childcare responsibilities) (Spurr et al. [1996] Am J Clin Nutr 63:870,878; [1997] Med Sci Sports Exerc 29:1255,1262). These findings were unexpected and raised questions regarding the actual types of activities engaged in by the two groups. In this article we address those questions by comparing the time allocation of the two groups. Time allocation during waking hours (14.2 ± 1.1 hours/day) was recorded in minute-by-minute diaries by trained observers for two consecutive days for 52 working women and 28 not-working women. The working women were engaged in predominately informal sector economic activities, such as street vending, childcare, and domestic service, in addition to their own household and childcare responsibilities. The activities of the not-working women were largely restricted to household and childcare responsibilities. The working women tended to spend less time in resting activities and TV-watching and more time in travel and miscellaneous work activities, but other between-group differences were not significant. We conclude that the time allocation of working women is similar to that of not-working women because 1) many of the activities engaged in are the same or similar, and 2) some working women are only engaged in income-earning activities for limited time periods. Am. J. Hum. Biol. 15:490,497, 2003. © 2003 Wiley-Liss, Inc. [source] Biochemical changes during larval development in the short neck clam, Paphia malabarica ChemnitzAQUACULTURE RESEARCH, Issue 13 2009Raghavan Gireesh Abstract Biochemical compositions were determined for eggs, D-shaped larvae, umbo larvae and pediveliger of the short neck clam Paphia malabarica Chemnitz. Spawned eggs were composed of 63.2% protein, 25.4% lipid and 11.4% carbohydrate. After 48 h of embryogenesis, 2.6% of the protein, 11.8% of the lipid and 3.2% of carbohydrate mass had been lost, providing 20.5%, 75.4% and 4.1% of the total energy expenditure of 0.2147 mJ embryo,1. During 48 h of metamorphosis, lipid was utilized first, followed by a heavy consumption of protein; protein, lipid and carbohydrate lost 23.8%, 50.2% and 32.5% of their mass respectively. Protein and lipid supplied a comparable amount of energy for metamorphosis, 34.2% and 55.2%, respectively, whereas, carbohydrate contributed only 10.6% to the 2.733 mJ larva,l metamorphic energy expenditure. [source] Calculation of resting energy expenditure in obese childrenACTA PAEDIATRICA, Issue 6 2004C-E Flodmark For the calculation of resting energy expenditure, which is the main part of total energy expenditure in children with low physical activity, Fusch et al. have developed an equation. Conclusion: This equation might be useful for research but not in daily work with obese patients. [source] | ||||||||||