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thermic effect of food

Cara Ocobock
OBJECTIVE: The aim of this research is to analyze how energy is allocated differently in temperate, hot, and cold environments among National Outdoor Leadership School students. METHOD: Basal metabolic rate, physical activity, thermoregulation, and the thermic effect of food were estimated to determine the total energy expenditure and energy allocation differences among a group of healthy, highly active adults (N = 59) participating in National Outdoor Leadership School courses in the western United States...
August 25, 2016: American Journal of Physical Anthropology
Elizabeth F Sutton, George A Bray, Jeffrey H Burton, Steven R Smith, Leanne M Redman
OBJECTIVE: Determine whether prolonged consumption of high- or low-protein diets modifies the thermogenic response to a standard meal. METHODS: Twenty-four healthy individuals were randomized to overfeeding diets containing low (5%, n = 8), normal (15%, n = 9), or high (25%, n = 7) protein for 56 days while inpatients. The thermic effect of food (TEF) was measured over 4 h by indirect calorimetry following a standard meal (20% of energy, 20% protein) or a meal that matched the study diet ("study meal")...
August 2016: Obesity
Maha H Alhussain, Ian A Macdonald, Moira A Taylor
BACKGROUND: Obesity is increasing in parallel with greater all-day food availability. The latter may promote meal irregularity, dysregulation of the energy balance, and poor metabolic health. OBJECTIVE: We investigated the effect of meal irregularity on the thermic effect of food (TEF), lipid concentrations, carbohydrate metabolism, subjective appetite, and gut hormones in healthy women. DESIGN: Eleven normal-weight women (18-40 y of age) were recruited in a randomized crossover trial with two 14-d isoenergetic diet periods (identical foods provided and free living) that were separated by a 14-d habitual diet washout period...
July 2016: American Journal of Clinical Nutrition
S A Purcell, S A Elliott, V E Baracos, Q S C Chu, C M Prado
Great discrepancies exist in the reported prevalence of altered energy metabolism (hypo- or hypermetabolism) in cancer patients, which is likely due to the vast array of phenomena that can affect energy expenditure in these patients. The purpose of this review was to critically evaluate key determinants of energy expenditure in cancer and the relevance for clinical practice. Resting energy expenditure (REE) is the largest and most commonly measured component of total energy expenditure. In addition to the energetic demand of the tumor itself, REE may be increased due to changes in inflammation, body composition and brown adipose tissue activation...
June 8, 2016: European Journal of Clinical Nutrition
Ryota Asahara, Masahiro Yamasaki
[Purpose] To investigate the influence of the level of spinal cord injury on the thermic effect of food intake (TEF) in persons with thoracic spinal cord injury. [Subjects and Methods] Seven male subjects with spinal cord injury (SCI; age, 40 ± 6 years) and six able-bodied subjects (AB; age, 37 ± 8 years) volunteered to participate in the present study. The subjects consumed an identical test meal consisting of 7.9 kcal/kg of body weight. Energy expenditure and plasma norepinephrine concentrations were measured over a 3-hour period...
April 2016: Journal of Physical Therapy Science
Hitomi Ogata, Fumi Kobayashi, Masanobu Hibi, Shigeho Tanaka, Kumpei Tokuyama
The thermic effect of food (TEF) is the well-known concept in spite of its difficulty for measuring. The gold standard for evaluating the TEF is the difference in energy expenditure between fed and fasting states (ΔEE). Alternatively, energy expenditure at 0 activity (EE0) is estimated from the intercept of the linear relationship between energy expenditure and physical activity to eliminate activity thermogenesis from the measurement, and the TEF is calculated as the difference between EE0 and postabsorptive resting metabolic rate (RMR) or sleeping metabolic rate (SMR)...
February 2016: Physiological Reports
Mary H Samuels, Irina Kolobova, Anne Smeraglio, Dawn Peters, Jonathan Q Purnell, Kathryn G Schuff
BACKGROUND: Thyrotropin (TSH)-suppressive doses of levothyroxine (LT4) have adverse effects on bone and cardiac function, but it is unclear whether metabolic function is also affected. The objective of this study was to determine whether women receiving TSH-suppressive LT4 doses have alterations in energy expenditure or body composition. METHODS: This study was a cross-sectional comparison between three groups of women: 26 women receiving chronic TSH-suppressive LT4 doses, 80 women receiving chronic replacement LT4 doses, and 16 untreated euthyroid control women...
March 2016: Thyroid: Official Journal of the American Thyroid Association
Cara Ocobock
OBJECTIVE: The purpose of this study was to develop a new model, the Allocation and Interaction Model (AIM), to better predict human total energy expenditure (TEE) among a group of highly active humans living in a variety of natural environments. AIM estimates were tested to determine if it produces more accurate TEE predictions than the Factorial Method. METHODS: AIM includes metabolic cost terms for basal metabolic rate, thermoregulation, and the thermic effect of food, as well as more accurate activity cost estimations...
May 2016: American Journal of Human Biology: the Official Journal of the Human Biology Council
Gustavo Abreu-Vieira, Cuiying Xiao, Oksana Gavrilova, Marc L Reitman
OBJECTIVES: We quantified the effect of environmental temperature on mouse energy homeostasis and body temperature. METHODS: The effect of environmental temperature (4-33 °C) on body temperature, energy expenditure, physical activity, and food intake in various mice (chow diet, high-fat diet, Brs3 (-/y) , lipodystrophic) was measured using continuous monitoring. RESULTS: Body temperature depended most on circadian phase and physical activity, but also on environmental temperature...
June 2015: Molecular Metabolism
Yftach Gepner, Nitzan Bril, Ilan Shelef, Dan Schwarzfuchs, Dana Serfaty, Michal Rein, Noa Cohen, Elad Shemesh, Osnat Tangi-Rosental, Benjamin Sarusi, Eyal Goshen, Shira Kenigsbuch, Yoash Chassidim, Rachel Golan, Shula Witkow, Yaakov Henkin, Meir J Stampfer, Assaf Rudich, Iris Shai
BACKGROUND: Studies examining the dynamics of the thermic effect of feeding (TEF) of specific food items and the relationship of TEF to visceral adiposity are limited. METHODS: We measured resting energy expenditure (REE) and early-TEF (40-min postprandial, e-TEF) after 8-h fast by indirect calorimetry in 40 obese men, and imaged abdominal fat tissues by magnetic resonance imaging. Each participant was examined on two occasions, 3-weeks apart. At each examination we measured fasting REE and then postprandial REE following the isocaloric [∼380 kcal] consumption of either 56 gr walnuts [(8% carbohydrates; 84% fat, of which 72% polyunsaturated fat)], or 5-slices (150gr) of whole-grain bread (48% carbohydrates; 32% fat)...
April 2016: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
Kenji Toyama, Xifan Zhao, Sachi Kuranuki, Yasuo Oguri, Eriko Kashiwa Kato, Yutaka Yoshitake, Teiji Nakamura
The relationship between eating speed and the thermic effect of food (TEF) remains unclear. We investigated the difference in the TEF when meals containing the same amount of energy were eaten in 5 min (fast eating) or 15 min (regular eating). Subjects were nine non-obese young women. Following a 350 kcal (1464 kJ) meal, energy expenditure and autonomic nervous system activity were measured. The frequency of mastication was also calculated. The TEF for the 15-min period after the start of eating with fast eating was significantly lower than with regular eating (p < 0...
March 2015: International Journal of Food Sciences and Nutrition
S Reeves, J W Huber, L G Halsey, M Villegas-Montes, J Elgumati, T Smith
BACKGROUND/OBJECTIVES: The body mass index (BMI) of breakfast eaters is frequently reported to be lower compared with that of breakfast skippers. This is not explained by differences in energy intakes, indicating there may be other mechanisms serving to drive this paradoxical association between breakfast and BMI. This study aimed to investigate the effect of eating breakfast versus morning fasting on measures predominantly of metabolism in lean and overweight participants who habitually eat or skip breakfast...
May 2015: European Journal of Clinical Nutrition
Dominik H Pesta, Varman T Samuel
High protein diets are increasingly popularized in lay media as a promising strategy for weight loss by providing the twin benefits of improving satiety and decreasing fat mass. Some of the potential mechanisms that account for weight loss associated with high-protein diets involve increased secretion of satiety hormones (GIP, GLP-1), reduced orexigenic hormone secretion (ghrelin), the increased thermic effect of food and protein-induced alterations in gluconeogenesis to improve glucose homeostasis. There are, however, also possible caveats that have to be considered when choosing to consume a high-protein diet...
2014: Nutrition & Metabolism
Narendra L Reddy, Chenjing Peng, Marcos C Carreira, Louise Halder, John Hattersley, Milan K Piya, Gyanendra Tripathi, Harpal S Randeva, Felipe F Casanueva, Philip G McTernan, Sudhesh Kumar, Thomas M Barber
OBJECTIVE: Meal duration may influence cardiometabolic health. The aim of this study was to explore postprandial effects of meal duration on human metabolism and appetite. DESIGN: Postprandial comparisons following a standard meal eaten slowly over 40 min ('D40') and the same meal eaten quickly over 10 min ('D10') on a different day. Each participant therefore acted as their own control, thereby limiting confounding factors. PATIENTS: Obese premenopausal Caucasian women (n = 10) with confirmed normoglycaemia were recruited from an obesity clinic at UHCW, Coventry UK...
June 2015: Clinical Endocrinology
L Anne Gilmore, Eric Ravussin, George A Bray, Hongmei Han, Leanne M Redman
BACKGROUND: Estimates of energy intake (EI) in humans have limited validity. OBJECTIVE: The objective was to test the accuracy and precision of the intake-balance method to estimate EI during weight gain induced by overfeeding. DESIGN: In 2 studies of controlled overfeeding (1 inpatient study and 1 outpatient study), baseline energy requirements were determined by a doubly labeled water study and caloric titration to weight maintenance. Overfeeding was prescribed as 140% of baseline energy requirements for 56 d...
September 2014: American Journal of Clinical Nutrition
Samer Hammoudeh, Abdulbari Bener, Mahmoud Zirie, Abdullah Al-Hamaq, Prem Chandra, Olivia Moses, Hildemar Dos Santos, Serena Tonstad
Metabolic syndrome is a cluster of metabolic abnormalities that increases the risk of cardiovascular disease and type 2 diabetes. Total human energy expenditure is divided into three major components; resting metabolic rate, thermic effect of food, and activity thermogenesis which is divided into exercise and non exercise activity thermogenesis (NEAT). In this study, NEAT was used as a lifestyle intervention on subjects with metabolic syndrome. 200 eligible patients from the Diabetes and Endocrinology Department at Hamad Medical Hospital in Doha, Qatar were assigned to an intervention (n = 100) or control (n = 100) group and followed for one year...
2013: Qatar Medical Journal
Emily E Noble, Charles J Billington, Catherine M Kotz, ChuanFeng Wang
Central oxytocin reduces food intake and increases energy expenditure. The ventromedial hypothalamic nucleus (VMN) is associated with energy balance and contains a high density of oxytocin receptors. We hypothesized that oxytocin in the VMN is a negative regulator of energy balance acting to reduce feeding and increase energy expenditure. To test this idea, oxytocin or vehicle was injected directly into the VMN of Sprague-Dawley rats during fasted and nonfasted conditions. Energy expenditure (via indirect calorimetry) and spontaneous physical activity (SPA) were recorded simultaneously...
September 15, 2014: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
Dalila Azzout-Marniche, Catherine Chaumontet, Nachiket A Nadkarni, Julien Piedcoq, Gilles Fromentin, Daniel Tomé, Patrick C Even
Obesity-prone (OP) rodents are used as models of human obesity predisposition. The goal of the present study was to identify preexisting defects in energy expenditure components in OP rats. Two studies were performed. In the first one, male Wistar rats (n = 48) were fed a high-carbohydrate diet (HCD) for 3 wk and then a high-fat diet (HFD) for the next 3 wk. This study showed that adiposity gain under HCD was 2.9-fold larger in carbohydrate-sensitive (CS) than in carbohydrate-resistant (CR) rats, confirming the concept of "carbohydrate-sensitive" rats...
August 1, 2014: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
Fumi Kobayashi, Hitomi Ogata, Naomi Omi, Shoichiro Nagasaka, Sachiko Yamaguchi, Masanobu Hibi, Kumpei Tokuyama
Epidemiological studies suggest an association between breakfast skipping and body weight gain, insulin resistance or type 2 diabetes. Time when meal is consumed affects postprandial increase in energy expenditure and blood glucose, and breakfast skipping may reduce 24 h energy expenditure and elevate blood glucose level. The present study evaluated the effect of breakfast skipping on diurnal variation of energy metabolism and blood glucose. The skipped breakfast was compensated by following big meals at lunch and supper...
May 2014: Obesity Research & Clinical Practice
Yunhua L Muller, Paolo Piaggi, Duncan Hoffman, Ke Huang, Brittany Gene, Sayuko Kobes, Marie S Thearle, William C Knowler, Robert L Hanson, Leslie J Baier, Clifton Bogardus
AIMS/HYPOTHESIS: Glucokinase (GCK) plays a role in glucose metabolism and glucose-stimulated insulin secretion. Rare mutations in GCK cause MODY. We investigated whether common variation (minor allele frequency ≥0.01) in GCK is associated with metabolic traits and type 2 diabetes. METHODS: Four exonic single-nucleotide polymorphisms (SNPs) and three SNPs predicted to cause loss of promoter function were identified in whole-genome sequence data from 234 Pima Indians...
July 2014: Diabetologia
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