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Indirect calorimetry

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https://www.readbyqxmd.com/read/28719766/energy-expenditure-of-standing-compared-to-sitting-while-conducting-office-tasks
#1
Jill Burns, Cuisle Forde, Sara Dockrell
Objectives This study aimed to investigate the energy expenditure of common office-based tasks. The objectives were to: (a) test the classification of tasks as sedentary or light-intensity physical activity and (b) compare the energy expenditure of tasks under two postural conditions (sitting and standing). Background The sedentary nature of office work has been highlighted as a health risk, and strategies to reduce sedentary behavior at work have been developed. However, there is limited evidence to guide the utilization of sit-stand workstations in the workplace for metabolic health benefits...
July 1, 2017: Human Factors
https://www.readbyqxmd.com/read/28717808/the-impact-of-multimorbidity-on-resting-metabolic-rate-in-community-dwelling-women-over-a-ten-year-period-a-cross-sectional-and-longitudinal-study
#2
A Nagel, A Jungert, A Spinneker, M Neuhäuser-Berthold
OBJECTIVES: Ageing has been associated with increasing multimorbidity. This study investigated whether the number of diseases is a predictor of resting metabolic rate (RMR) and its long-term changes in community-dwelling elderly women. SUBJECTS AND DESIGN: Cross-sectional and longitudinal data, obtained over ten years with repeated follow-ups, from 180 women aged 60 - 86 years and with a BMI of 18 - 43 kg/m2 at baseline were analyzed. MEASUREMENTS: RMR was measured using indirect calorimetry and body composition by bioelectrical impedance analysis...
2017: Journal of Nutrition, Health & Aging
https://www.readbyqxmd.com/read/28716975/metabolic-phenotype-in-the-mouse-model-of-osteogenesis-imperfecta
#3
Iris Boraschi-Diaz, Josephine T Tauer, Omar El Rifai, Delphine Guillemette, Geneviève Lefebvre, Frank Rauch, Mathieu Ferron, Svetlana V Komarova
Osteogenesis Imperfecta (OI) is the most common heritable bone fragility disorder, usually caused by dominant mutations in genes coding for collagen type I alpha chains, COL1A1 or COL1A2. Osteocalcin is now recognized as a bone-derived regulator of insulin secretion and sensitivity and glucose homeostasis. Since OI is associated with increased rates of bone formation and resorption, we hypothesized that the levels of undercarboxylated osteocalcin are increased in OI. The objective of this study was to determine changes in osteocalcin and to elucidate the metabolic phenotype in the Col1a1Jrt/+ mouse, a model of dominant OI caused by a Col1a1 mutation...
July 17, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28702809/beta2-adrenergic-stimulation-increases-energy-expenditure-at-rest-but-not-during-submaximal-exercise-in-active-overweight-men
#4
Johan Onslev, Glenn Jacobson, Christian Narkowicz, Vibeke Backer, Anders Kalsen, Michael Kreiberg, Søren Jessen, Jens Bangsbo, Morten Hostrup
PURPOSE: β2-Agonists have been proposed as weight-loss treatment, because they elevate energy expenditure. However, it is unknown what effect β2-agonists have on energy expenditure in overweight individuals. Furthermore, the influence of β2-agonist R- and S-enantiomer ratio for the increased energy expenditure is insufficiently explored. METHODS: Nineteen males were included in the study of which 14 completed. Subjects were 31.6 (±3.5) years [mean (±95% CI)] and had a fat percentage of 22...
July 12, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28702327/loss-of-adamts5-enhances-brown-adipose-tissue-mass-and-promotes-browning-of-white-adipose-tissue-via-creb-signaling
#5
Dries Bauters, Mathias Cobbaut, Lotte Geys, Johan Van Lint, Bianca Hemmeryckx, H Roger Lijnen
OBJECTIVE: A potential strategy to treat obesity - and the associated metabolic consequences - is to increase energy expenditure. This could be achieved by stimulating thermogenesis through activation of brown adipose tissue (BAT) and/or the induction of browning of white adipose tissue (WAT). Over the last years, it has become clear that several metalloproteinases play an important role in adipocyte biology. Here, we investigated the potential role of ADAMTS5. METHODS: Mice deficient in ADAMTS5 (Adamts5(-/-)) and wild-type (Adamts5(+/+)) littermates were kept on a standard of Western-type diet for 15 weeks...
July 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/28692687/exercise-before-breakfast-increases-24-h-fat-oxidation-in-female-subjects
#6
Kaito Iwayama, Ryosuke Kawabuchi, Yoshiharu Nabekura, Reiko Kurihara, Insung Park, Masashi Kobayashi, Hitomi Ogata, Momoko Kayaba, Naomi Omi, Makoto Satoh, Kumpei Tokuyama
BACKGROUND: Exercise performed in a postprandial state does not increase 24-h fat oxidation of male and female subjects. Conversely, it has been shown in male subjects that exercise performed in a postabsorptive state increases 24-h fat oxidation compared with that in sedentary control and that with exercise trials performed after breakfast, lunch, or dinner. There is a paucity of study evaluating the effect of exercise performed in a postabsorptive state in female subjects. METHOD: Nine young female subjects participated in indirect calorimetry measurement over 24-h using a room-size metabolic chamber in which subjects remained sedentary or performed 60 min exercise before breakfast at 50% of [Formula: see text]...
2017: PloS One
https://www.readbyqxmd.com/read/28691958/guidelines-for-the-provision-and-assessment-of-nutrition-support-therapy-in-the-pediatric-critically-ill-patient-society-of-critical-care-medicine-and-american-society-for-parenteral-and-enteral-nutrition
#7
Nilesh M Mehta, Heather E Skillman, Sharon Y Irving, Jorge A Coss-Bu, Sarah Vermilyea, Elizabeth Anne Farrington, Liam McKeever, Amber M Hall, Praveen S Goday, Carol Braunschweig
This document represents the first collaboration between two organizations, American Society of Parenteral and Enteral Nutrition and the Society of Critical Care Medicine, to describe best practices in nutrition therapy in critically ill children. The target of these guidelines is intended to be the pediatric (> 1 mo and < 18 yr) critically ill patient expected to require a length of stay greater than 2 or 3 days in a PICU admitting medical, surgical, and cardiac patients. In total, 2,032 citations were scanned for relevance...
July 2017: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/28689303/direct-calorimetry-a-brief-historical-review-of-its-use-in-the-study-of-human-metabolism-and-thermoregulation
#8
REVIEW
Glen P Kenny, Sean R Notley, Daniel Gagnon
Direct calorimetry is the gold standard means of measuring human metabolic rate and its use has been fundamental for understanding metabolism in health and disease. While metabolic rate is now more commonly estimated indirectly from measures of the oxygen consumed during respiration, direct calorimetry provides the user with the unique capacity to quantify the heat produced from aerobic and anaerobic metabolism by measuring heat exchange between the body and the environment. This review provides a brief historical overview of the fundamental concepts which underlie direct calorimetry, of pioneer scientists which developed these concepts into functional pieces of equipment and the subsequent use of direct calorimetry to advance our understanding of energy balance, nutrition, and the pathogenesis of metabolic diseases...
July 8, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28688120/electron-beam-water-calorimetry-measurements-to-obtain-beam-quality-conversion-factors
#9
Bryan R Muir, Claudiu D Cojocaru, Malcolm R McEwen, Carl K Ross
PURPOSE: To provide results of water calorimetry and ion chamber measurements in high-energy electron beams carried out at the National Research Council Canada (NRC). There are three main aspects to this work: 1) investigation of the behavior of ionization chambers in electron beams of different energies with focus on long-term stability, 2) water calorimetry measurements to determine absorbed dose to water in high-energy beams for direct calibration of ion chambers, and 3) using measurements of chamber response relative to reference ion chambers, determination of beam quality conversion factors, kQ, for several ion chamber types...
July 8, 2017: Medical Physics
https://www.readbyqxmd.com/read/28686844/guidelines-for-the-provision-and-assessment-of-nutrition-support-therapy-in-the-pediatric-critically-ill-patient-society-of-critical-care-medicine-and-american-society-for-parenteral-and-enteral-nutrition
#10
Nilesh M Mehta, Heather E Skillman, Sharon Y Irving, Jorge A Coss-Bu, Sarah Vermilyea, Elizabeth Anne Farrington, Liam McKeever, Amber M Hall, Praveen S Goday, Carol Braunschweig
This document represents the first collaboration between 2 organizations-the American Society for Parenteral and Enteral Nutrition and the Society of Critical Care Medicine-to describe best practices in nutrition therapy in critically ill children. The target of these guidelines is intended to be the pediatric critically ill patient (>1 month and <18 years) expected to require a length of stay >2-3 days in a PICU admitting medical, surgical, and cardiac patients. In total, 2032 citations were scanned for relevance...
May 1, 2017: JPEN. Journal of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28682934/the-accuracy-of-resting-metabolic-rate-prediction-equations-in-athletes
#11
Andrew R Jagim, Clayton L Camic, Jacob Kisiolek, Joel Luedke, Jacob Erickson, Margaret T Jones, Jonathan M Oliver
The purpose of this study was to determine the accuracy of five different resting metabolic rate (RMR) prediction equations in male and female athletes. Twenty-two female (19.7± 1.4 yrs.; 166.2 ± 5.5 cm; 63.5 ± 7.3 kg; 49.2 ± 4.3 kg of Fat-Free Mass; 23.4 ± 4.4 BF%) and twenty-eight male (20.2 ± 1.6 yrs.; 181.9 ± 6.1 cm; 94.5 ± 16.2 kg; 79.1 ± 7.2 kg of FFM; 15.1 ± 8.5% BF) athletes were recruited to participate in one day of metabolic testing. Assessments comprised RMR measurements via indirect calorimetry and body composition analyses via air displacement plethysmography...
July 3, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28670546/indirect-calorimetry-from-bench-to-bedside
#12
REVIEW
Riddhi Das Gupta, Roshna Ramachandran, Padmanaban Venkatesan, Shajith Anoop, Mini Joseph, Nihal Thomas
Accurate determination of energy expenditure (EE) is vitally important yet often neglected in clinical practice. Indirect calorimetry (IC) provides one of the most sensitive, accurate, and noninvasive measurements of EE in an individual. Over the last couple of decades, this technique has been applied to clinical circumstances such as acute illness and parenteral nutrition. Beyond assessing the nutritional needs, it has also shed light on various aspects of nutrient assimilation, thermogenesis, the energetics of physical exercise, and the pathogenesis of obesity and diabetes...
July 2017: Indian Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28670532/are-predictive-equations-for-estimating-resting-energy-expenditure-accurate-in-asian-indian-male-weightlifters
#13
Mini Joseph, Riddhi Das Gupta, L Prema, Mercy Inbakumari, Nihal Thomas
BACKGROUND: The accuracy of existing predictive equations to determine the resting energy expenditure (REE) of professional weightlifters remains scarcely studied. Our study aimed at assessing the REE of male Asian Indian weightlifters with indirect calorimetry and to compare the measured REE (mREE) with published equations. A new equation using potential anthropometric variables to predict REE was also evaluated. MATERIALS AND METHODS: REE was measured on 30 male professional weightlifters aged between 17 and 28 years using indirect calorimetry and compared with the eight formulas predicted by Harris-Benedicts, Mifflin-St...
July 2017: Indian Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28665293/an-original-piecewise-model-for-computing-energy-expenditure-from-accelerometer-and-heart-rate-signals
#14
Hector Manuel Romero-Ugalde, Mael Garnotel, Maeva Doron, Pierre Jallon, Guillaume Charpentier, Sylvia Franc, Erik Huneker, Chantal Simon, Stephane Bonnet
Activity Energy Expenditure (EE) plays an important role in healthcare, therefore, accurate EE measures are required. Currently available reference EE acquisition methods, such as doubly labeled water and indirect calorimetry, are complex, expensive, uncomfortable, and/or difficult to apply on real time. To overcome these drawbacks, the goal of this paper is to propose a model for computing EE in real time (minute-by-minute) from heart rate and accelerometer signals. Approach: The proposed model, which consists of an original branched model, uses heart rate signals for computing EE on moderate to vigorous physical activities and a linear combination of heart rate and counts per minute for computing EE on light to moderate physical activities...
June 30, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28661445/thermal-stability-of-phase-separated-domains-in-multicomponent-lipid-membranes-with-local-anesthetics
#15
Ko Sugahara, Naofumi Shimokawa, Masahiro Takagi
The functional mechanisms of local anesthetics (LAs) have not yet been fully explained, despite their importance in modern medicine. Recently, an indirect interaction between channel proteins and LAs was proposed as follows: LAs alter the physical properties of lipid membranes, thus affecting the channel proteins. To examine this hypothesis, we investigated changes in thermal stability in lipid membranes consisting of dioleoylphosphocholine, dipalmitoylphosphocholine, and cholesterol by adding the LAs, lidocaine and tetracaine...
June 29, 2017: Membranes
https://www.readbyqxmd.com/read/28651828/influence-of-expression-of-ucp3-plin1-and-pparg2-on-the-oxidation-of%C3%A2-substrates-after-hypocaloric-dietary-intervention
#16
Cristiana Cortes de Oliveira, Carolina Ferreira Nicoletti, Marcela Augusta de Souza Pinhel, Bruno Affonso Parenti de Oliveira, Driele Cristina Gomes Quinhoneiro, Natália Yumi Noronha, Priscila Giacomo Fassini, Júlio Sérgio Marchini, Wilson Araújo da Silva Júnior, Wilson Salgado Júnior, Carla Barbosa Nonino
BACKGROUND & AIMS: In addition to environmental and psychosocial factors, it is known that genetic factors can also influence the regulation of energy metabolism, body composition and determination of excess weight. The objective of this study was to evaluate the influence of UCP3, PLIN1 and PPARG2 genes on the substrates oxidation in women with grade III obesity after hypocaloric dietary intervention. SUBJECTS/METHODS: This is a longitudinal study with 21 women, divided into two groups: Intervention Group (G1): 11 obese women (Body Mass Index (BMI) ≥40 kg/m(2)), and Control Group (G2): 10 eutrophic women (BMI between 18...
June 15, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28634968/adapting-the-chester-step-test-to-predict-peak-oxygen-uptake-in-children
#17
Albane Bertha Rosa Maggio, Philippe Vuistiner, Antoinette Crettenand, René Tabin, Xavier Eric Martin, Maurice Beghetti, Nathalie Jacqueline Farpour-Lambert, Olivier Deriaz
AIM OF THE STUDY: Maximal exercise testing may be difficult to perform in clinical practice, especially in obese children who have low cardiorespiratory fitness and exercise tolerance. We aimed to elaborate a model predicting peak oxygen consumption (VO2) in lean and obese children with use of the submaximal Chester step test. METHODS: We performed a maximal step test, which consisted of 2-minute stages with increasing intensity to exhaustion, in 169 lean and obese children (age range: 7-16 years)...
June 21, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/28633495/estradiol-protects-against-cardio-respiratory-dysfunctions-and-oxidative-stress-in-intermittent-hypoxia
#18
Sofien Laouafa, Alexandra Ribon-Demars, François Marcouiller, Damien Roussel, Aida Bairam, Vincent Pialoux, Vincent Joseph
Study Objectives: We tested the hypothesis that estradiol (E2) protects against cardio-respiratory disorders and oxidative stress induced by chronic intermittent hypoxia (CIH) in adult female rats. Methods: Sprague-Dawley female rats (230-250g) were ovariectomized (OVX) and implanted with osmotic pumps delivering vehicle (Veh) or E2 (0.5 mg/kg/day). After 14 days of recovery, the rats were exposed to chronic CIH (21%-10% O2 - 8 hours/day - 10 cycles/hour) or room air (RA)...
June 19, 2017: Sleep
https://www.readbyqxmd.com/read/28627208/irisin-is-weakly-associated-with-usual-physical-activity-in-young-overweight-women
#19
Beatriz Tenorio, Teresa Jiménez, Gladys Barrera, Sandra Hirsch, Maria Pia De la Maza, Rodrigo Troncoso, María Belén Farias, Juan Manuel Rodríguez, Daniel Bunout
PURPOSE: To determine if irisin plasma levels are associated with regular physical activity, body composition and metabolic parameters in women subjected to calorie restriction. SUBJECTS AND METHODS: We studied 42 women aged 34 ± 13 years with a body mass index of 27.7 ± 1.8 kg/m2, who were subjected to a calorie restriction for three months. At baseline and at the end of the study, weight, waist and hip circumference, laboratory parameters, body composition by DEXA, resting and activity energy expenditure by indirect calorimetry and 72 hours actigraphy were measured...
June 5, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/28626215/genetic-variation-in-the-obesity-gene-fto-is-not-associated-with-decreased-fat-oxidation-the-neo-study
#20
L L Blauw, R Noordam, S Trompet, J F P Berbée, F R Rosendaal, D van Heemst, K W van Dijk, D O Mook-Kanamori, R de Mutsert, P C N Rensen
BACKGROUND: The FTO gene harbours the strongest common genetic variant associated with obesity. Recently, rs1421085-T to -C substitution mapped in FTO was shown to induce a developmental shift of human adipocytes from an energy-combusting beige to an energy-storing white phenotype in vitro. As browning of adipocytes selectively enhances fat oxidation (FatOx), we hypothesized that rs1421085-C in FTO is associated with deceased FatOx compared with carbohydrate oxidation (CarbOx) and an increased respiratory quotient (RQ)...
June 19, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
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