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Indirect calorimetry

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https://www.readbyqxmd.com/read/28431343/measurement-of-physical-activity-levels-in-the-intensive-care-unit-and-functional-outcomes-an-observational-study
#1
Lisa J Beach, Kate Fetterplace, Lara Edbrooke, Selina M Parry, Rachel Curtis, Thomas Rechnitzer, Sue Berney, Linda Denehy
PURPOSE: Primary aims were: (1) objectively quantify levels of physical activity with the sensewear armband mini-fly motion sensor (SWA-MF), (2) evaluate the correlation of SWA-MF measurement of active and resting energy expenditure against the ICU Mobility scale (IMS) and indirect calorimetry respectively. MATERIALS AND METHODS: Adults mechanically ventilated ≥48h and anticipated to remain in ICU≥5days were included. Physical activity (PA) was measured using a SWA-MF (over the first five days); energy expenditure was measured with both the SWA-MF and the Deltatrac II metabolic cart on day three; highest level of mobility was assessed on the IMS...
April 7, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/28422589/energy-expenditure-in-vinyasa-yoga-versus-walking
#2
Sally A Sherman, Renee J Rogers, Kelliann K Davis, Ryan L Minster, Seth A Creasy, Nicole C Mullarkey, Matthew O'Dell, Patrick Donahue, John M Jakicic
Whether the energy cost of vinyasa yoga meets the criteria for moderate-to-vigorous physical activity has not been established. PURPOSE: To compare energy expenditure during acute bouts of vinyasa yoga and two walking protocols. METHODS: Participants (20 males, 18 females) performed 60-minute sessions of vinyasa yoga (YOGA), treadmill walking at a self-selected brisk pace (SELF), and treadmill walking at a pace that matched the heart rate of the YOGA session (HR-Match)...
April 19, 2017: Journal of Physical Activity & Health
https://www.readbyqxmd.com/read/28422530/physiological-changes-following-competition-in-male-and-female-physique-athletes-a-pilot-study
#3
Eric T Trexler, Katie R Hirsch, Bill I Campbell, Abbie E Smith-Ryan
The purpose of the current study was to evaluate changes in body composition, metabolic rate, and hormones during post-competition recovery. Data were collected from natural physique athletes (7 male/8 female) within one week before (T1) competition, within one week after (T2), and 4-6 weeks after (T3) competition. Measures included body composition (fat mass [FM] and lean mass [LM] from ultrasongraphy), resting metabolic rate (RMR; indirect calorimetry), and salivary leptin, testosterone, cortisol, ghrelin, and insulin...
April 19, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28422217/increased-substrate-affinity-in-the-escherichia-coli-l28r-dihydrofolate-reductase-mutant-causes-trimethoprim-resistance
#4
Haleh Abdizadeh, Yusuf Talha Tamer, Omer Acar, Erdal Toprak, Ali Rana Atilgan, Canan Atilgan
Dihydrofolate reductase (DHFR) is a ubiquitous enzyme with an essential role in cell metabolism. DHFR catalyzes the reduction of dihydrofolate to tetrahydrofolate, which is a precursor for purine and thymidylate synthesis. Several DHFR targeting antifolate drugs including trimethoprim, a competitive antibacterial inhibitor, have therefore been developed and are clinically used. Evolution of resistance against antifolates is a common public health problem rendering these drugs ineffective. To combat the resistance problem, it is important to understand resistance-conferring changes in the DHFR structure and accordingly develop alternative strategies...
April 19, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28421269/thermal-balance-of-nellore-cattle
#5
Cíntia Carol de Melo Costa, Alex Sandro Campos Maia, Sheila Tavares Nascimento, Carolina Cardoso Nagib Nascimento, Marcos Chiquitelli Neto, Vinícius de França Carvalho Fonsêca
This work aimed at characterizing the thermal balance of Nellore cattle from the system of indirect calorimetry using a facial mask. The study was conducted at the Animal Biometeorology Laboratory of the São Paulo State University, Jaboticabal, Brazil. Five male Nellore weighing 750 ± 62 kg, at similar ages and body conditions were distributed in four 5 × 5 Latin squares (5 days of records and five schedules) during 20 days. Physiological and environmental measurements were obtained from the indirect calorimetry system using a facial mask...
April 18, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28417008/association-of-gene-coding-variation-and-resting-metabolic-rate-in-a-multi-ethnic-sample-of-children-and-adults
#6
Jacklyn N Hellwege, Digna R Velez Edwards, Sari Acra, Kong Chen, Maciej S Buchowski, Todd L Edwards
BACKGROUND: Resting metabolic rates (RMR) vary across individuals. Understanding the determinants of RMR could provide biological insight into obesity and its metabolic consequences such as type 2 diabetes and cardiovascular diseases. METHODS: The present study measured RMR using reference standard indirect calorimetry and evaluated genetic variations from an exome array in a sample of children and adults (N = 262) predominantly of African and European ancestry with a wide range of ages (10 - 67 years old) and body mass indices (BMI; 16...
2017: BMC Obesity
https://www.readbyqxmd.com/read/28412986/effects-of-subacute-ingestion-of-chlorogenic-acids-on-sleep-architecture-and-energy-metabolism-through-activity-of-the-autonomic-nervous-system-a-randomised-placebo-controlled-double-blinded-cross-over-trial
#7
Insung Park, Ryuji Ochiai, Hitomi Ogata, Momoko Kayaba, Sayaka Hari, Masanobu Hibi, Yoshihisa Katsuragi, Makoto Satoh, Kumpei Tokuyama
Chlorogenic acids (CGA) are the most abundant polyphenols in coffee. Continuous consumption of CGA reduces body fat and body weight. Since energy metabolism and sleep are controlled by common regulatory factors, consumption of CGA might modulate sleep. Lack of sleep has been identified as a risk factor for obesity, hypertension and type 2 diabetes. The aim of this study was to determine the effects of ingesting CGA over 5 d on energy metabolism and sleep quality in humans. A total of nine healthy subjects (four male and five female) completed a placebo-controlled, double-blinded, cross-over intervention study...
April 17, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28399934/erratum-to-can-calculation-of-energy-expenditure-based-on-co2-measurements-replace-indirect-calorimetry
#8
Taku Oshima, Séverine Graf, Claudia-Paula Heidegger, Laurence Genton, Jérôme Pugin, Claude Pichard
No abstract text is available yet for this article.
April 12, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28392339/energy-expenditure-metabolic-power-and-high-speed-activity-during-linear-and-multi-directional-running
#9
Chelsea L Oxendale, Jamie Highton, Craig Twist
OBJECTIVES: The purpose of the study was to compare measures of energy expenditure derived from indirect calorimetry and micro-technology, as well as high power and high speed activity during linear and multi-directional running. DESIGN: Repeated measures. METHODS: Twelve university standard team sport players completed a linear and multi-directional running condition. Estimated energy expenditure, as well as time at high speed (>14.4kmh(-1)) and high power (>20Wkg(-1)) were quantified using a 10Hz micro-technology device and compared with energy expenditure derived from indirect calorimetry...
March 21, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28389989/single-vagus-nerve-stimulation-reduces-early-postprandial-c-peptide-levels-but-not-other-hormones-or-postprandial-metabolism
#10
M W Tang, F S van Nierop, F A Koopman, H M Eggink, D M Gerlag, M W Chan, R Zitnik, F M Vaz, J A Romijn, P P Tak, M R Soeters
A recent study in rheumatoid arthritis (RA) patients using electrical vagus nerve stimulation (VNS) to activate the inflammatory reflex has shown promising effects on disease activity. Innervation by the autonomic nerve system might be involved in the regulation of many endocrine and metabolic processes and could therefore theoretically lead to unwanted side effects. Possible effects of VNS on secretion of hormones are currently unknown. Therefore, we evaluated the effects of a single VNS on plasma levels of pituitary hormones and parameters of postprandial metabolism...
April 8, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28387566/energy-expenditure-in-playground-games-in-primary-school-children-measured-by-accelerometer-and-heart-rate-monitors
#11
Jorge Cañete García-Prieto, Vicente Martinez-Vizcaino, Antonio García-Hermoso, Mairena Sánchez-López, Natalia Arias-Palencia, Juan Fernando Ortega Fonseca, Ricardo Mora-Rodriguez
The aim of this study was to examine the energy expenditure (EE) measured using indirect calorimetry (IC) during playground games and to assess the validity of heart rate (HR) and accelerometry counts as indirect indicators of EE in children´s physical activity games. 32 primary school children (9.9 ± 0.6 years old, 19.8 ± 4.9 kg · m(-2) BMI and 37.6 ± 7.2 mL · kg(-1) · min(-1) VO2max). Indirect calorimetry (IC), accelerometry and HR data were simultaneously collected for each child during a 90 min session of 30 playground games...
April 7, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28386236/metabolic-response-of-visceral-white-adipose-tissue-of-obese-mice-exposed-for-5-days-to-human-room-temperature-compared-to-mouse-thermoneutrality
#12
Inge van der Stelt, Femke Hoevenaars, Jitka Široká, Lidwien de Ronde, David Friedecký, Jaap Keijer, Evert van Schothorst
Housing of laboratory mice at room temperature (22°C) might be considered a constant cold stress, which induces a thermogenic program in brown adipose tissue (BAT). However, the early adaptive response of white adipose tissue (WAT), the fat storage organ of the body, to a change from thermoneutrality to room temperature is not known. This was investigated here for various WAT depots, focusing on epididymal WAT (eWAT), widely used as reference depot. Male adult diet-induced obese (DIO) C57BL/6JOlaHsd mice housed at thermoneutrality (29°C), were for 5 days either switched to room temperature (22°C) or remained at thermoneutrality...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28382850/are-predictive-energy-expenditure-equations-in-ventilated-surgery-patients-accurate
#13
Christopher J Tignanelli, Allan G Andrews, Kurt M Sieloff, Melissa R Pleva, Heidi A Reichert, Jennifer A Wooley, Lena M Napolitano, Jill R Cherry-Bukowiec
BACKGROUND: While indirect calorimetry (IC) is the gold standard used to calculate specific calorie needs in the critically ill, predictive equations are frequently utilized at many institutions for various reasons. Prior studies suggest these equations frequently misjudge actual resting energy expenditure (REE) in medical and mixed intensive care unit (ICU) patients; however, their utility for surgical ICU (SICU) patients has not been fully evaluated. Therefore, the objective of this study was to compare the REE measured by IC with REE calculated using specific calorie goals or predictive equations for nutritional support in ventilated adult SICU patients...
January 1, 2017: Journal of Intensive Care Medicine
https://www.readbyqxmd.com/read/28374809/energy-expenditure-in-people-with-motor-complete-paraplegia
#14
T Holmlund, E Ekblom-Bak, E Franzén, C Hultling, L Nilsson Wikmar, K Wahman
STUDY DESIGN: The present descriptive clinical and laboratory study is cross-sectional in design. OBJECTIVES: The primary aim is to describe and compare resting energy expenditure (REE) and energy expenditure (EE) during different standardized sedentary, non-exercise and exercise activities in people with motor-complete paraplegia (Th7 to Th12.). A secondary aim was to compare men and women. METHODS: Thirty-eight adults (10 women) with SCI, T7-T12 AIS A-B, were recruited...
April 4, 2017: Spinal Cord
https://www.readbyqxmd.com/read/28363838/orexin-activation-counteracts-decreases-in-nonexercise-activity-thermogenesis-neat-caused-by-high-fat-diet
#15
P E Bunney, A N Zink, A A Holm, C J Billington, C M Kotz
Overweight and obesity result from an imbalance between caloric intake and energy expenditure, including expenditure from spontaneous physical activity (SPA). Changes in SPA and resulting changes in non-exercise activity thermogenesis (NEAT) likely interact with diet to influence risk for obesity. However, previous research on the relationship between diet, physical activity, and energy expenditure has been mixed. The neuropeptide orexin is a driver of SPA, and orexin neuron activity can be manipulated using DREADDs (Designer Receptors Exclusively Activated by Designer Drugs)...
March 28, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28361062/is-the-sensewear-armband-accurate-enough-to-quantify-and-estimate-energy-expenditure-in-healthy-adults
#16
Alejandro Santos-Lozano, Adrián Hernández-Vicente, Raúl Pérez-Isaac, Fernanda Santín-Medeiros, Carlos Cristi-Montero, Jose Antonio Casajús, Nuria Garatachea
BACKGROUND: The SenseWear Armband (SWA) is a monitor that can be used to estimate energy expenditure (EE); however, it has not been validated in healthy adults. The objective of this paper was to study the validity of the SWA for quantifying EE levels. METHODS: Twenty-three healthy adults (age 40-55 years, mean: 48±3.42 years) performed different types of standardized physical activity (PA) for 10 minutes (rest, walking at 3 and 5 km·h(-1), running at 7 and 9 km·h(-1), and sitting/standing at a rate of 30 cycle·min(-1))...
March 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28356274/relation-between-hypermetabolism-cachexia-and-survival-in-cancer-patients-a-prospective-study-in-390-cancer-patients-before-initiation-of-anticancer-therapy
#17
Clara Vazeille, Anne Jouinot, Jean-Philippe Durand, Nathalie Neveux, Pascaline Boudou-Rouquette, Olivier Huillard, Jérôme Alexandre, Luc Cynober, François Goldwasser
Background: Cachexia is a major cause of death in cancer patients. The role of hypermetabolism in cancer cachexia remains unclear.Objective: We studied the relation between resting energy expenditure (REE), the estimated energy balance, clinical and biological markers of cachexia, and survival.Design: REE was measured with the use of indirect calorimetry in cancer patients before the initiation of anticancer therapies. Hypermetabolic, normometabolic, and hypometabolic patients were identified with the use of Boothby's standard...
March 29, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28355404/daily-variability-of-resting-energy-expenditure-in-acute-kidney-injury-patients-on-dialysis
#18
Cassiana Regina de Góes, Ana Claudia Soncini Sanches, André Balbi, Daniela Ponce
INTRODUCTION: It is needed for nutrition prescription correct estimate of resting energy expenditure (REE), which is a challenge given the possible daily variation in critically ill patients with acute kidney injury (AKI). OBJECTIVE: To evaluate the daily variability of REE measured by indirect calorimetry (IC) in patients with AKI and dialysis indication and identify clinical variables associated with REE. METHODS: The REE was measured on the time of dialysis indication and the subsequent four days...
March 2017: Jornal Brasileiro de Nefrologia: ʹorgão Oficial de Sociedades Brasileira e Latino-Americana de Nefrologia
https://www.readbyqxmd.com/read/28349096/hyperthermia-and-cardiovascular-strain-during-an-extreme-heat-exposure-in-young-versus-older-adults
#19
Glen P Kenny, Martin P Poirier, George S Metsios, Pierre Boulay, Sheila Dervis, Brian J Friesen, Janine Malcolm, Ronald J Sigal, Andrew J E Seely, Andreas D Flouris
We examined whether older individuals experience greater levels of hyperthermia and cardiovascular strain during an extreme heat exposure compared to young adults. During a 3-hour extreme heat exposure (44°C, 30% relative humidity), we compared body heat storage, core temperature (rectal, visceral) and cardiovascular (heart rate, cardiac output, mean arterial pressure, limb blood flow) responses of young adults (n = 30, 19-28 years) against those of older adults (n = 30, 55-73 years). Direct calorimetry measured whole-body evaporative and dry heat exchange...
2017: Temperature: Multidisciplinary Biomedical Journal
https://www.readbyqxmd.com/read/28338405/physiological-responses-to-treadmill-running-with-body-weight-support-in-hypoxia-compared-to-normoxia
#20
Ben J Lee, Charles Douglas Thake
CONTEXT: Anecdotal reports suggest elite sports clubs combine lower body positive pressure (LBPP) rehabilitation with a hypoxic stimulus in order to maintain or increase physiological and metabolic strain, which are reduced during LBPP. However the effects of hypoxia on cardiovascular and metabolic response during LBPP rehabilitation is unknown. OBJECTIVE: Evaluate the use of normobaric hypoxia as a means to increase physiological strain during body weight supported (BWS) running...
March 24, 2017: Journal of Sport Rehabilitation
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