Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Energy Balance01:19

Energy Balance

The human body gets energy from the three macronutrients: carbohydrates, proteins, and fats. Energy is released when the chemical bonds in the organic compounds present in the food are broken down. The energy content of food is measured in kilocalories (kcal), defined as the amount of heat required to raise the temperature of one kilogram of water by one degree Celsius. This value is determined by measuring the temperature change of the water surrounding a calorimeter after the complete...
Metabolic Rate01:25

Metabolic Rate

The human body is a powerhouse of energy, with every cell performing numerous functions that require energy. This energy production and consumption is measured by the metabolic rate, which quantifies the total heat generated by all the body's chemical reactions and mechanical work. This measurement helps to determine the rate of kilocalorie (kcal) consumption needed to fuel all ongoing activities.
The Basal Metabolic Rate (BMR) measures the energy expended at rest.
Several factors influence the...
Quantifying Heat02:46

Quantifying Heat

Thermal Energy Microscopically, thermal energy is the kinetic energy associated with the random motion of atoms and molecules. Temperature is a quantitative measure of “hot” or “cold”, which depends on the amount of thermal energy. When the atoms and molecules in an object are moving or vibrating quickly, they have a higher average kinetic energy (KE) (or higher thermal energy), and the object is perceived as “hot”, or it is described as being at a higher temperature. When the atoms and...
Body Temperature01:25

Body Temperature

The body's temperature, measured in degrees, is determined by the balance between heat production and dissipation to the surrounding environment. For instance, if exercising vigorously, the body will produce more heat, causing sweat and dissipating that heat. Despite extreme environmental conditions and physical exertion, the human temperature-control system maintains a constant core body temperature (the temperature of deep tissues, which are the tissues located beneath the skin and other...
Production Efficiency01:01

Production Efficiency

Net production efficiency (NPE) is the efficiency at which organisms assimilate energy into biomass for the next trophic level. Due to low metabolic rates and less energy spent on thermoregulatory processes, the NPE of ectotherms (cold-blooded animals) is 10 times higher than endotherms (warm-blooded animals).
Constant Volume Calorimetry02:41

Constant Volume Calorimetry

Calorimeters are useful to determine the heat released or absorbed by a chemical reaction. Coffee cup calorimeters are designed to operate at constant (atmospheric) pressure and are convenient to measure heat flow (or enthalpy change) accompanying processes that occur in solution at constant pressure. A different type of calorimeter that operates at constant volume, colloquially known as a bomb calorimeter, is used to measure the energy produced by reactions that yield large amounts of heat and...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Prognosis in 41 severely malnourished anorexia nervosa patients.

Clinical nutrition (Edinburgh, Scotland)·2012
Same author

Hedonic reactivity to visual and olfactory cues: rapid facial electromyographic reactions are altered in anorexia nervosa.

Biological psychology·2010
Same author

Body fluid retention and body weight change in anorexia nervosa patients during refeeding.

Clinical nutrition (Edinburgh, Scotland)·2010
Same author

Pleasure for visual and olfactory stimuli evoking energy-dense foods is decreased in anorexia nervosa.

Psychiatry research·2010
Same author

[Tube feeding at home in anorexia nervosa patients].

Presse medicale (Paris, France : 1983)·2009
Same author

[Nutrition. Changing our food behaviors].

La Revue du praticien·2009

Related Experiment Video

Updated: Jun 25, 2026

Using a Combination of Indirect Calorimetry, Infrared Thermography, and Blood Glucose Levels to Measure Brown Adipose Tissue Thermogenesis in Humans
04:54

Using a Combination of Indirect Calorimetry, Infrared Thermography, and Blood Glucose Levels to Measure Brown Adipose Tissue Thermogenesis in Humans

Published on: June 2, 2023

[Energy expenditure. How can they be measured?].

Daniel Rigaud1

  • 1CHU Dijon, hôpital du Bocage, service endocrinologie-nutrition, 21079 Dijon Cedex, France. daniel.rigaud@chu-dijon.fr

La Revue Du Praticien
|March 4, 2009
PubMed
Summary

Body weight regulation is linked to energy expenditure components. Overweight individuals exhibit lower energy expenditure, while thin individuals show higher expenditure, explaining non-linear body mass changes.

Area of Science:

  • Metabolism and Body Composition
  • Physiology
  • Biochemistry

Context:

  • Body weight is determined by body mass and fat-free mass.
  • The Krebs cycle generates ATP, essential for cellular functions.
  • Total energy expenditure (EE) comprises resting EE, diet-induced thermogenesis, activity-based EE, and thermoregulation EE.

Purpose:

  • To explore the relationship between body weight, body composition, and total energy expenditure.
  • To analyze how different components of energy expenditure vary in overweight and thin individuals.
  • To understand the adaptive mechanisms influencing body weight changes.

Summary:

  • Overweight individuals generally have decreased resting EE, diet-induced thermogenesis, activity-based EE, and EE from thermoregulation.

More Related Videos

Determining Basal Energy Expenditure and the Capacity of Thermogenic Adipocytes to Expend Energy in Obese Mice
06:57

Determining Basal Energy Expenditure and the Capacity of Thermogenic Adipocytes to Expend Energy in Obese Mice

Published on: November 11, 2021

Calorespirometry: A Powerful, Noninvasive Approach to Investigate Cellular Energy Metabolism
09:08

Calorespirometry: A Powerful, Noninvasive Approach to Investigate Cellular Energy Metabolism

Published on: May 31, 2018

Related Experiment Videos

Last Updated: Jun 25, 2026

Using a Combination of Indirect Calorimetry, Infrared Thermography, and Blood Glucose Levels to Measure Brown Adipose Tissue Thermogenesis in Humans
04:54

Using a Combination of Indirect Calorimetry, Infrared Thermography, and Blood Glucose Levels to Measure Brown Adipose Tissue Thermogenesis in Humans

Published on: June 2, 2023

Determining Basal Energy Expenditure and the Capacity of Thermogenic Adipocytes to Expend Energy in Obese Mice
06:57

Determining Basal Energy Expenditure and the Capacity of Thermogenic Adipocytes to Expend Energy in Obese Mice

Published on: November 11, 2021

Calorespirometry: A Powerful, Noninvasive Approach to Investigate Cellular Energy Metabolism
09:08

Calorespirometry: A Powerful, Noninvasive Approach to Investigate Cellular Energy Metabolism

Published on: May 31, 2018

  • Thin individuals tend to have elevated resting EE, diet-induced thermogenesis, activity-based EE, and potentially EE from thermoregulation.
  • Weight loss in obese individuals leads to decreases in these energy expenditure components, while weight gain in thin individuals leads to increases.

    • Impact:

    • Explains the adaptive physiological responses that influence body weight regulation.
    • Highlights the dynamic nature of energy expenditure in response to changes in body mass.
    • Provides insights into the metabolic challenges associated with weight management and body composition.