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Indirect calorimetry

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https://www.readbyqxmd.com/read/28826698/reliability-of-resting-metabolic-rate-measurements-in-young-adults-impact-of-methods-for-data-analysis
#1
Guillermo Sanchez-Delgado, Juan M A Alcantara, Lourdes Ortiz-Alvarez, Huiwen Xu, Borja Martinez-Tellez, Idoia Labayen, Jonatan R Ruiz
BACKGROUND & AIMS: A high inter-day reliability is a key factor to analyze the magnitude of change in resting metabolic rate (RMR) after an intervention, and the impact of using different methods for data analysis is not known. The aims of this study were: i) to analyze the impact of methods for data analysis on RMR and respiratory exchange ratio (RER) estimation; ii) to analyze the impact of methods for data analysis on inter-day RMR and RER reliability; iii) to compare inter-day RMR and RER reliability across methods for data analysis in participants who achieved steady state (SS) vs...
August 5, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28818819/quantifying-human-movement-using-the-movn-smartphone-app-validation-and-field-study
#2
Ralph Maddison, Luke Gemming, Javier Monedero, Linda Bolger, Sarahjane Belton, Johann Issartel, Samantha Marsh, Artur Direito, Madeleine Solenhill, Jinfeng Zhao, Daniel John Exeter, Harshvardhan Vathsangam, Jonathan Charles Rawstorn
BACKGROUND: The use of embedded smartphone sensors offers opportunities to measure physical activity (PA) and human movement. Big data-which includes billions of digital traces-offers scientists a new lens to examine PA in fine-grained detail and allows us to track people's geocoded movement patterns to determine their interaction with the environment. OBJECTIVE: The objective of this study was to examine the validity of the Movn smartphone app (Moving Analytics) for collecting PA and human movement data...
August 17, 2017: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/28813842/using-wearable-physiological-sensors-to-predict-energy-expenditure
#3
Kimberly A Ingraham, Daniel P Ferris, C David Remy
Lower-limb assistive robotic devices are often evaluated by measuring a reduction in the user's energy cost. Using indirect calorimetry to estimate energy cost is poorly suited for real-time estimation and long-term collection. The goal of this study was to use data from wearable sensors to predict energy cost with better temporal resolution and less variability than breath measurements. We collected physiological data (heart rate, electrodermal activity, skin temperature) and mechanical data (EMG, accelerometry) from three healthy subjects walking on a treadmill at various speeds on level ground, inclined, and backwards...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28809814/yerba-mat%C3%A3-ilex-paraguariensis-metabolic-satiety-and-mood-state-effects-at-rest-and-during-prolonged-exercise
#4
Ahmad Alkhatib, Roisin Atcheson
Yerba Maté (YM), has become a popular herb ingested for enhancing metabolic health and weight-loss outcomes. No studies have tested the combined metabolic, satiety, and psychomotor effects of YM during exercise. We tested whether YM ingestion affects fatty acid oxidation (FAO), profile of mood state score (POMS), and subjective appetite scale (VAS), during prolonged moderate exercise. Twelve healthy active females were randomized to ingest either 2 g of YM or placebo (PLC) in a repeated-measures design. Participants rested for 120 min before performing a 30-min cycling exercise corresponding to individuals' crossover point intensity (COP)...
August 15, 2017: Nutrients
https://www.readbyqxmd.com/read/28803868/integration-of-sweet-taste-and-metabolism-determines-carbohydrate-reward
#5
Maria Geraldine Veldhuizen, Richard Keith Babbs, Barkha Patel, Wambura Fobbs, Nils B Kroemer, Elizabeth Garcia, Martin R Yeomans, Dana M Small
Post-ingestive signals related to nutrient metabolism are thought to be the primary drivers of reinforcement potency of energy sources. Here, in a series of neuroimaging and indirect calorimetry human studies, we examine the relative roles of caloric load and perceived sweetness in driving metabolic, perceptual, and brain responses to sugared beverages. Whereas caloric load was manipulated using the tasteless carbohydrate maltodextrin, sweetness levels were manipulated using the non-nutritive sweetener sucralose...
August 2, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28802792/fat-mass-fat-free-mass-and-resting-metabolic-rate-in-weight-stable-sleeve-gastrectomy-patients-compared-with-weight-stable-nonoperated-patients
#6
Luigi Schiavo, Giuseppe Scalera, Vincenzo Pilone, Gabriele De Sena, Antonio Iannelli, Alfonso Barbarisi
BACKGROUND: There is evidence that body composition and resting metabolic rate (RMR) in weight-stable patients after Roux-en-Y gastric bypass and duodenal switch is similar to that of nonoperated individuals within the same body mass index (BMI) interval. Currently, data concerning fat mass (FM), fat-free mass (FFM), and RMR on weight-stable patients after sleeve gastrectomy (SG) are lacking. OBJECTIVES: To assess FM, FFM, and RMR, in a selected and homogenous population of weight-stable SG patients (WSSG) and compare them with those obtained from healthy normal weight-stable nonoperated (WSNO) volunteers controls of similar sex, age, and BMI...
July 1, 2017: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/28802287/energy-expenditure-in-severe-sepsis-or-septic-shock-in-a-thai-medical-intensive-care-unit
#7
Anupol Panitchote, Nontapak Thiangpak, Pranithi Hongsprabhas, Cameron Hurst
BACKGROUND AND OBJECTIVES: Energy expenditure in severe sepsis/septic shock patients was measured by indirect calorimetry and the correlation of energy expenditure between indirect calorimetry and predictive equations was determined. METHODS AND STUDY DESIGN: This was a prospective, observational analytical study. Severe sepsis or septic shock patients were measured for energy expenditure over 72 hours by indirect calorimetry that was measured by a mechanical ventilator (EngströmCarestation, GE Healthcare)...
2017: Asia Pacific Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28791776/low-validity-of-predictive-equations-for-calculating-resting-energy-expenditure-in-overweight-and-obese-women-with-polycystic-ovary-syndrome
#8
A M Dos S Rodrigues, A B P Costa, D L Campos, M P S Silva, A L Cândido, L C Dos Santos, A V M Ferreira
BACKGROUND: Predictive equations are the main clinical tools for determining resting energy expenditure (REE). However, their adequate use in overweight and obese individuals is unclear. Thus, we investigated the best predictive equations for estimating REE in overweight and obese women with polycystic ovary syndrome (PCOS). METHODS: Eleven analyses were performed with prediction equations (pREE) based on anthropometric parameters in 30 overweight or obese women with PCOS without other chronic diseases...
August 8, 2017: Journal of Human Nutrition and Dietetics: the Official Journal of the British Dietetic Association
https://www.readbyqxmd.com/read/28774950/energy-expenditure-responses-to-exercise-training-in-older-women
#9
Xuewen Wang, Kimberly P Bowyer, Ryan R Porter, Charity B Breneman, Sabra S Custer
Previous studies have shown inconsistent findings regarding how structured exercise affects energy expenditure (EE). This study was designed to determine the changes in EE and physical activity following exercise training in older women. Nonobese (body mass index = 25.8 ± 3.4 kg·m(-2)) women (60-75 years, n = 72) completed a 4-month supervised aerobic exercise training of lower- or higher-dose (33.6 and 58.8 kJ·kg(-1) body weight weekly, respectively) at 50-55% of heart rate reserve. Total daily EE (TDEE) by the doubly labeled water method, resting metabolic rate (RMR) via indirect calorimetry, and physical activity by accelerometer were determined before and at the end of exercise training...
August 2017: Physiological Reports
https://www.readbyqxmd.com/read/28763620/acute-effects-of-exercise-intensity-on-subsequent-substrate-utilisation-appetite-and-energy-balance-in-men-and-women
#10
Ghalia Shamlan, Paul Bech, M Denise Robertson, Adam L Collins
Exercise is capable of influencing the regulation of energy balance by acutely modulating appetite and energy intake coupled to effects on substrate utilization. Yet, few studies have examined acute effects of exercise intensity on aspects of both energy intake and energy metabolism, independently of energy cost of exercise. Furthermore, little is known as to the gender differences of these effect. One hour after a standardised breakfast, 40 (19 female), healthy participants (BMI 23.6±3.6 kg.m-2, VO2peak 34...
August 1, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28758166/a-coconut-oil-rich-meal-does-not-enhance-thermogenesis-compared-to-corn-oil-in-a-randomized-trial-in-obese-adolescents
#11
Janna LaBarrie, Marie-Pierre St-Onge
BACKGROUND: Consumption of medium chain triglycerides (MCT) in overweight adults increases thermogenesis and improves weight management. Coconut oil is a rich natural source of MCT, but its thermogenic effect is unknown. Our study evaluated the effects of a test oil enriched in coconut oil, on energy expenditure, satiety, and metabolic markers in a randomized, double blind, cross-over study. METHODS AND FINDINGS: Fifteen children, age 13-18 years, body mass index >85th percentile for age and sex, were enrolled...
2017: Insights Nutr Metab
https://www.readbyqxmd.com/read/28751372/energy-cost-of-running-instability-evaluated-with-wearable-trunk-accelerometry
#12
Kurt Heinrich Schütte, Saint Sackey, Rachel Venter, Benedicte Vanwanseele
Maintaining stability under dynamic conditions is an inherent challenge to bipedal running. This challenge may impose an energetic cost (Ec) thus hampering endurance running performance, yet the underlying mechanisms are not clear. Wireless tri-axial trunk accelerometry is a simple tool that could be used to unobtrusively evaluate these mechanisms. Here, we test a cost of instability hypothesis by examining the contribution of trunk accelerometry-based measures (tri-axial root mean square, step and stride regularity, and sample entropy) to inter-individual variance in Ec (kcal...
July 27, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28750585/nutritional-ketone-salts-increase-fat-oxidation-but-impair-high-intensity-exercise-performance-in-healthy-adult-males
#13
Trevor O'Malley, Etienne Myette-Cote, Cody Durrer, Jonathan P Little
This study investigated the impact of raising plasma beta-hydroxybutyrate (β-OHB) through ingestion of ketone salts on substrate oxidation and performance during cycling exercise. Ten healthy adult males (age, 23 ± 3 years; body mass index, 25 ± 3 kg/m(2), peak oxygen uptake, 45 ± 10 mL/(kg·min)(-1)) were recruited to complete 2 experimental trials. Before enrollment in the experimental conditions, baseline anthropometrics and cardiorespiratory fitness (peak oxygen uptake) were assessed and familiarization to the study protocol was provided...
July 27, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28749749/estimation-of-resting-energy-expenditure-validation-of-previous-and-new-predictive-equations-in-obese-children-and-adolescents
#14
Nilüfer Acar-Tek, Duygu Ağagündüz, Bülent Çelik, Rukiye Bozbulut
OBJECTIVE: Accurate estimation of resting energy expenditure (REE) in childrenand adolescents is important to establish estimated energy requirements. The aim of the present study was to measure REE in obese children and adolescents by indirect calorimetry method, compare these values with REE values estimated by equations, and develop the most appropriate equation for this group. METHODS: One hundred and three obese children and adolescents (57 males, 46 females) between 7 and 17 years (10...
August 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28747486/modifying-the-dietary-carbohydrate-to-protein-ratio-alters-the-postprandial-macronutrient-oxidation-pattern-in-liver-of-ampk-deficient-mice
#15
Tristan Chalvon-Demersay, Patrick C Even, Catherine Chaumontet, Julien Piedcoq, Benoit Viollet, Claire Gaudichon, Daniel Tomé, Marc Foretz, Dalila Azzout-Marniche
Background: Hepatic AMP-activated kinase (AMPK) activity is sensitive to the dietary carbohydrate-to-protein ratio. However, the role of AMPK in metabolic adaptations to variations in dietary macronutrients remains poorly understood.Objective: The objective of this study was to determine the role of hepatic AMPK in the adaptation of energy metabolism in response to modulation of the dietary carbohydrate-to-protein ratio.Methods: Male 7-wk-old wild-type (WT) and liver AMPK-deficient (knockout) mice were fed either a normal-protein and normal-carbohydrate diet (NP-NC; 14% protein, 76% carbohydrate on an energy basis), a low-protein and high-carbohydrate diet (LP-HC; 5% protein, 85% carbohydrate), or a high-protein and low-carbohydrate diet (HP-LC; 55% protein, 35% carbohydrate) for 3 wk...
July 26, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28745475/bodypump-versus-traditional-heavy-load-resistance-training-on-changes-in-resting-metabolic-rate-in-overweight-untrained-women
#16
Anne M Rustaden, Christina Gjestvang, Kari Bø, Lene A Hagen Haakstad, Gøran Paulsen
BACKGROUND: Moderate to heavy load resistance training (RT) is advocated for overweight and obese individuals. One of the beneficial effects of RT is increased resting metabolic rate (RMR), which typically makes up the majority of the total daily energy expenditure. It is, however, unclear if low to moderate load RT affects RMR. Hence, the present study aimed to examine the effects of twelve weeks of BodyPump, on RMR in previous untrained women with BMI ≥25.0, and to compare the results with individual heavy load RT...
July 25, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28745473/does-the-aerobic-threshold-correlate-with-the-maximal-fat-oxidation-rate-in-short-stage-treadmill-tests
#17
Ratko Peric, Marco Meucci, Pitre C Bourdon, Zoran Nikolovski
BACKGROUND: The aim of this study was to identify the exercise intensity that elicited the highest rate of fat utilization (FATmax) and to assess its relationship with the aerobic threshold (AeT) in male athletes. We hypothesized existence of high correlation of these two parameters when a short-staged graded treadmill test with AeT identified through breath-by-breath gas exchange analysis was used. METHODS: Fifty-six trained male athletes (age 25.6 ± 3.4 y, height 197...
July 25, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28739801/sustained-o-glcnacylation-reprograms-mitochondrial-function-to-regulate-energy-metabolism
#18
Ee Phie Tan, Steven R McGreal, Stefan Graw, Robert Tessman, Scott J Koppel, Pramod Dhakal, Zhen Zhang, Miranda Machacek, Natasha E Zachara, Devin C Koestler, Kenneth R Peterson, John P Thyfault, Russell H Swerdlow, Partha Krishnamurthy, Luciano DiTacchio, Udayan Apte, Chad Slawson
Dysfunctional mitochondria and generation of reactive oxygen species (ROS) promote chronic diseases, which have spurred interest in the molecular mechanisms underlying these conditions. Previously, we have demonstrated that disruption of post-translational modification of proteins with β-linked N-acetylglucosamine (O-GlcNAcylation) via overexpression of the O-GlcNAc regulating enzymes O-GlcNAc transferase (OGT) or O-GlcNAcase (OGA) impairs mitochondrial function. Here, we report that sustained alterations in O-GlcNAcylation either by pharmacological or genetic manipulation also alters metabolic function...
July 24, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28730728/beneficial-long-term-antidiabetic-actions-of-n-and-c-terminally-modified-analogues-of-apelin-13-in-diet-induced-obese-diabetic-mice
#19
V Parthsarathy, C Hogg, P R Flatt, F P M O'Harte
AIMS: This study investigated the chronic effects of twice daily administration of stable apelin analogues, apelin-13 amide and (pGlu)apelin-13 amide, on metabolic parameters in glucose intolerant and insulin resistant diet-induced obese (DIO) mice fed a high-fat diet for 150 days. STUDY DESIGN & METHODS: Groups of mice received twice daily (09:00 and 17:00 h) injections of saline vehicle, apelin-13 amide, (pGlu)apelin-13 amide or exendin-4(1-39) for 28 days (all at 25 nmol/kg)...
July 20, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28727087/effects-of-zilpaterol-hydrochloride-on-methane-production-total-body-oxygen-consumption-and-blood-metabolites-in-finishing-beef-steers
#20
K E Hales, A P Foote, D W Brake, T M Brown-Brandl, V M Artegoitia, H C Freetly
An indirect calorimetry experiment was conducted to determine the effects of feeding zilpaterol hydrochloride (ZH) for 20 d on total body oxygen consumption, respiratory quotient, methane production, and blood metabolites in finishing beef steers. Sixteen Angus steers (initial BW = 555 ± 12.7 kg) were individually fed at ad libitum intake and used in a completely randomized design. The model included the fixed effects of dietary treatment, day, and treatment × day. Dry matter intake did not differ between the treatments ( = 0...
July 2017: Journal of Animal Science
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