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Indirect calorimetry

Justina V Caldas, Katie Hilton, Nirun Boonsinchai, Judith A England, Andy Mauromoustakos, Craig N Coon
Changes in heat production (HP) and body composition (BC) in modern broiler breeders can provide means to understand nutrient utilization. Twelve Cobb 500 breeders were evaluated 10 times from 26 to 59 wk of age. The same wired caged breeders were moved to respiratory chambers connected to an indirect calorimetry to obtain oxygen consumption (VO2) and carbon dioxide production (VCO2), HP, and respiratory exchange ratio (RER). The same hens were evaluated for BC using a dual X-ray absorptiometry (DEXA). Data were analyzed during light (16 h) and dark (8 h) period using a mixed model to evaluate calorimetry parameters, a factorial design 2 × 10 for normalized calorimetry parameters, and Complete Randomized Design (CRD)-one way ANOVA for BC...
April 24, 2018: Poultry Science
Sean R Notley, Robert D Meade, Andrew W DʼSouza, Brian J Friesen, Glen P Kenny
PURPOSE: Prolonged work in the heat may exacerbate the rise in core temperature on the next work day, especially in older workers who display impairments in whole-body heat loss that increase body heat storage and core temperature relative to young adults during heat stress. We therefore evaluated whether whole-body heat loss in older adults was impaired on the day following prolonged work in the heat. METHODS: Whole-body heat exchange and heat storage were assessed in nine older (53-64 years) males during three, 30-min bouts of semi-recumbent cycling at fixed rates of metabolic heat production (150 (Ex1), 200 (Ex2), 250 Wm (Ex3)), each separated by 15-min recovery, in hot-dry conditions (40°C, 20% relative humidity), immediately prior to (Day 1), and on the day following (Day 2), a prolonged, work simulation (~7...
April 21, 2018: Medicine and Science in Sports and Exercise
R Scott, J Minnion, T Tan, S R Bloom
The gut hormone oxyntomodulin (OXM) causes weight loss by reducing appetite and increasing energy expenditure. Several analogues are being developed to treat obesity. Exactly how oxyntomodulin works, however, remains controversial. OXM can activate both glucagon and GLP-1 receptors but no specific receptor has been identified. It is thought that the anorectic effect occurs predominantly through GLP-1 receptor activation but, to date, it has not been formally confirmed which receptor is responsible for the increased energy expenditure...
April 19, 2018: Peptides
Cassiana R de Góes, André Luis Balbi, Daniela Ponce
Acute kidney injury (AKI) is a frequent and serious condition with high mortality. The presence of hypermetabolism may be a factor related to poorer prognosis. This study evaluated the resting energy expenditure (REE) of intensive care unit (ICU) patients with severe AKI using indirect calorimetry (IC) and identified factors associated with metabolism categories. Patients were evaluated through measurement of REE and estimation of basal energy expenditure (BEE) using the Harris⁻Benedict equation. Metabolism categories were as follows: hypermetabolism (REE/BEE > 1...
April 19, 2018: Nutrients
Myles W O'Brien, Susan A Robinson, Ryan J Frayne, Said Mekary, Jonathon R Fowles, Derek S Kimmerly
Canadian physical activity guidelines recommend older adults accumulate 150 minutes of weekly moderate-vigorous physical activity (MVPA). Older adults who are insufficiently active may have reduced blood vessel health and an increased risk of cardiovascular disease. We tested this hypothesis in 11 older adults who did (7♀; 65±5 years; MVPA=239±81 minutes/week) and 10 older adults who did not (7♀; 68±9 years; MVPA=95±33 minutes/week) meet MVPA guidelines. Flow-mediated dilation (FMD) in the brachial (BA) and popliteal (POP) arteries, as well as, nitroglycerin-mediated dilation (NMD; endothelial-independent dilation) in the POP were assessed via ultrasonography...
April 19, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
Mark Hübers, Corinna Geisler, Anja Bosy-Westphal, Wiebke Braun, Maryam Pourhassan, Thorkild I A Sørensen, Manfred J Müller
BACKGROUND/OBJECTIVES: We investigated whether fat mass (FM) and total adipose tissue (TAT) can be used interchangeably and FM per TAT adds to metabolic risk assessment. SUBJECTS/METHODS: Cross-sectional data were assessed in 377 adults (aged 18-60 years; 51.2% women). FM was measured by either 4-compartment (4C) model or quantitative magnetic resonance (QMR); total-, subcutaneous- and visceral adipose tissue (TAT, SAT, VAT), and liver fat by whole-body MRI; leptin, insulin, homeostasis model assessment of insulin resistance (HOMA-IR), C-reactive protein (CRP), and triglycerides; resting energy expenditure and respiratory quotient by indirect calorimetry were determined...
April 18, 2018: European Journal of Clinical Nutrition
E K Li, H Liu, Y K Li, L Liu, F L Wang, D F Li, S Zhang
The objective of this experiment was to determine the NE content of different dietary lipids fed to growing pigs using indirect calorimetry. Thirty-six growing (initial BW: 41.1 ± 3.1 kg) barrows were allotted to six diets based on completely randomized design with 6 replicate pigs per diet. Diets included a corn-soybean meal basal diet and 5 test diets each containing 10% palm oil, poultry fat, fish oil, corn oil or flaxseed oil at the expense of corn and soybean meal. During each period, pigs were individually housed in metabolism crates for 14 days, which included 7 days for adaptation to feed, metabolism crates and environmental conditions...
April 13, 2018: Journal of Animal Science
Sepideh Kaviani, Dale A Schoeller, Eric Ravussin, Edward L Melanson, Sarah T Henes, Lara R Dugas, Ronald E Dechert, George Mitri, Paul F M Schoffelen, Pim Gubbels, Asa Tornberg, Stephen Garland, Marco Akkermans, Jamie A Cooper
BACKGROUND: Several indirect calorimetry (IC) instruments are commercially available, but comparative validity and reliability data are lacking. Existing data are limited by inconsistencies in protocols, subject characteristics, or single-instrument validation comparisons. The aim of this study was to compare accuracy and reliability of metabolic carts using methanol combustion as the cross-laboratory criterion. METHODS: Eight 20-minute methanol burn trials were completed on 12 metabolic carts...
April 2018: Nutrition in Clinical Practice
C Bétry, E Meugnier, M Pflieger, G Grenet, S Hercberg, P Galan, E Kesse-Guyot, H Vidal, M Laville
AIM: Ageing is often associated with metabolic abnormalities such as insulin resistance, although some people remain metabolically healthy throughout their lives. The aim of this study was to gain more insight into metabolic health with increasing age. METHODS: Two groups of robust and of frail subjects, respectively, were identified based on a composite ageing indicator and recruited from the French SU.VI.MAX 2 cohort of older disease-free subjects. In all, 14 men and 12 women, aged 67±4 years, with similar anthropometric and metabolic characteristics at baseline (BMI: 24...
February 12, 2018: Diabetes & Metabolism
Roberto de Cleva, Filippe Camarotto Mota, Alexandre Vieira Gadducci, Lilian Cardia, Julia Maria D'Andréa Greve, Marco Aurelio Santo
BACKGROUND: There is an increased interest in understanding how variation in body composition (BC) and energy expenditure is related to successful weight loss after surgery. It has been suggested that low resting metabolic rate (RMR) could be associated with poor weight loss. OBJECTIVES: To determine the relation among changes in BC, RMR, and weight loss after bariatric surgery. SETTING: University tertiary care hospital, Brazil. METHODS: A cohort of 45 patients submitted to bariatric surgery was prospectively studied...
March 1, 2018: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
Peng Zhang, Steven D Godin, Matthew V Owens
BACKGROUND: This study aimed to investigate the validity and reliability of the energy expenditure (EE) estimation of Apple Watch among college students. METHODS: Thirty college students completed two sets of three 10-minute treadmill walking and running trials while wearing three Apple Watches and being connected to indirect calorimetry. The walking trials were at speeds of 54, 80, and 107 m•min-1 while the running trials were at 134, 161, 188m•min-1. Energy expenditure comparisons were made using Two-way ANOVA with repeatedmeasures...
April 4, 2018: Journal of Sports Medicine and Physical Fitness
Malin Werling, Lars Fändriks, Torsten Olbers, Tom Mala, Jon Kristinsson, Kaj Stenlöf, Ville Wallenius, Neil G Docherty, Carel W le Roux
OBJECTIVE: The greater weight loss achieved following Biliopancreatic Diversion with Duodenal Switch (BPDS) versus Roux-en-Y Gastric Bypass (RYGB) has been attributed to the malabsorptive effects of BPDS. Increased weight loss after BPDS could also be underpinned by larger increases in energy expenditure. Hypothetically, the more radical reconfiguration of the small intestine in BPDS could result in an accentuated increase in meal associated thermogenesis (MAT). DESIGN: Female subjects (baseline mean age 40 years, mean BMI-55kg/m2) were assessed four years after randomization to BPDS (n = 6) or RYGB (n = 6)...
2018: PloS One
Micheline Tereza Pires Souza, Pierre Singer, Gislaine Aparecida Ozorio, Vitor Modesto Rosa, Maria Manuela Ferreira Alves, Rossana Verónica Mendoza López, Dan L Waitzberg
OBJECTIVES: Patients with head and neck cancer have changes in body composition and resting energy expenditure (REE) related to significant inflammatory processes. We investigated REE and body composition in a population of patients with head and neck cancer, comparing the measured REE with predicted energy expenditure and deriving an equation of anthropometric values and body composition. METHODS: This retrospective, observational, descriptive study of a single center included patients with head and neck cancer...
February 5, 2018: Nutrition
Corinne Jotterand Chaparro, Clémence Moullet, Patrick Taffé, Jocelyne Laure Depeyre, Marie-Hélène Perez, David Longchamp, Jacques Cotting
Provision of adequate energy intake to critically ill children is associated with improved prognosis, but resting energy expenditure (REE) is rarely determined by indirect calorimetry (IC) due to practical constraints. Some studies have tested the validity of various predictive equations that are routinely used for this purpose, but no systematic evaluation has been made. Therefore, we performed a systematic review of the literature to assess predictive equations of REE in critically ill children. We systematically searched the literature for eligible studies, and then we extracted data and assigned a quality grade to each article according to guidelines of the Academy of Nutrition and Dietetics...
March 30, 2018: JPEN. Journal of Parenteral and Enteral Nutrition
Priscila Berti Zanella, Camila Coutinho Ávila, Carolina Guerini de Souza
BACKGROUND: For patients with pulmonary hypertension, nutrition status is an independent predictor of morbidity and mortality, and energy expenditure can be strongly influenced by lung disease. Indirect calorimetry (IC) is the gold standard for measuring resting energy expenditure (REE), this study aimed to compare the results of REE estimated by different methods with those obtained by IC for patients with pulmonary hypertension. METHODS: In this cross-sectional study (n = 34), REE was estimated by bioelectrical impedance analysis and the predictive equations of Harris-Benedict, Food and Agriculture Organization / World Health Organization, Institute of Medicine, Cunningham, Katch-McArdle, and Mifflin-St Jeor...
December 18, 2017: Nutrition in Clinical Practice
S P Fenemor, A R Homer, T L Perry, C M Skeaff, M C Peddie, N J Rehrer
AIMS: To quantify and compare energy utilization associated with prolonged sitting alone, or interrupted with regular activity breaks and/or an additional bout of continuous physical activity. METHODS AND RESULTS: Thirty six adults (11 males, BMI 24.1 ± 4.6) completed four interventions: (1) prolonged sitting (SIT), (2) sitting with 2-min of walking every 30 min (RAB), (3) prolonged sitting with 30-min of continuous walking at the end of the day (SIT + PA), (4) a combination of the activities in (2) and (3) above (RAB + PA)...
February 13, 2018: Nutrition, Metabolism, and Cardiovascular Diseases: NMCD
Charlotte R Milling, Janet L Rachlow, Mark A Chappell, Meghan J Camp, Timothy R Johnson, Lisa A Shipley, David R Paul, Jennifer S Forbey
Small mammals in habitats with strong seasonal variation in the thermal environment often exhibit physiological and behavioral adaptations for coping with thermal extremes and reducing thermoregulatory costs. Burrows are especially important for providing thermal refuge when above-ground temperatures require high regulatory costs (e.g., water or energy) or exceed the physiological tolerances of an organism. Our objective was to explore the role of burrows as thermal refuges for a small endotherm, the pygmy rabbit ( Brachylagus idahoensis ), during the summer and winter by quantifying energetic costs associated with resting above and below ground...
2018: PeerJ
Bodil M K Larsen, Megan R Beggs, Amanda Y Leong, Sung Hyun Kang, Rabin Persad, Gonzalo Garcia Guerra
BACKGROUND & AIMS: Energy is essential for the treatment and recovery of children admitted to Pediatric Intensive Care Units (PICU). There are significant immediate and long-term health consequences of both under- and over-feeding in this population. Energy requirements of critically ill children vary depending on age, nutritional status, sepsis, fever, pharmacotherapy, and duration and stage of critical illness. This study aimed to determine the incidence of over- and under-feeding and to compare hospital outcomes between these feeding categories...
April 2018: Clinical Nutrition ESPEN
Levi M Teigen, Sara R DiCecco, David M Vock, Kelsey L Vierow, Lindsay Andrews, Kris D Hammel, Jad G Sfeir, John M Miles, Daniel L Hurley
OBJECTIVE: To introduce the use of qualitative assessment in energy expenditure (EE) equation research to improve the understanding of performance of the equations in the clinical setting. PATIENTS AND METHODS: Hospitalized individuals who had an indirect calorimetry (IC) measurement during their hospital stay from 2010 to 2012 were included in the study (n = 59). An additional 1000 patients hospitalized during this time were used to limit the IC cohort to a more "clinically relevant" BMI range (n = 46)...
April 2018: Clinical Nutrition ESPEN
M Compagnat, S Mandigout, D Chaporro, J Y Salle, J C Daviet
OBJECTIVE: To verify the relation between spontaneous walking speed (Sfree) and oxygen cost of walking at Sfree (Cwfree) in post-stroke hemiparetic patients and to test the validity of a prediction model to estimate Cwfree based on Sfree. DESIGN: We included 26 participants (mean age 65.1 years [SD 15.7]) with mild to moderate disability after stroke who walked at Sfree using mobility aids if necessary for 6min. The Cwfree was measured at a stabilized metabolic rate by indirect calorimetry with the Metamax 3B spiroergometry device...
March 21, 2018: Annals of Physical and Rehabilitation Medicine
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