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Metabolic Rate01:25

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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.
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When two or more physical quantities are linked by a single relationship, a change in one variable necessarily affects the others. This interdependence forms the basis of related rates analysis, which examines how different quantities change with respect to time. A classic physical example is an expanding balloon, where the size of the balloon changes continuously as air is added.For a hot air balloon, the inflated envelope is commonly idealized as a perfect sphere to simplify mathematical...
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Polarimetry finds application in chemical kinetics to measure the concentration and reaction kinetics of optically active substances during a chemical reaction. Optically active substances have the capability of rotating the plane of polarization of linearly polarized light passing through them—a feature called optical rotation. Optical activity is attributed to the molecular structure of substances. Normal monochromatic light is unpolarized and possesses oscillations of the electrical...
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Measurement of Metabolic Rate in Drosophila using Respirometry
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Does basal metabolic rate drive eating rate?

Christiani Jeyakumar Henry1, Shalini Ponnalagu2, Xinyan Bi2

  • 1Clinical Nutrition Research Centre, A*Star, Singapore Institute for Clinical Sciences, Singapore; Department of Biochemistry, National University of Singapore, Singapore.

Physiology & Behavior
|March 18, 2018
PubMed
Summary

Adults with higher basal metabolic rate (BMR) and fat-free mass (FFM) tend to eat faster. This study found a significant link between higher BMR, FFM, and increased eating rate (ER), suggesting metabolic factors influence eating speed.

Keywords:
Basal metabolic rateEating rateEnergy intakeEnergy requirementFat free mass

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Area of Science:

  • Metabolic Physiology
  • Human Nutrition
  • Behavioral Science

Background:

  • Understanding energy intake (EI) drivers is advancing, but biological factors influencing eating rate (ER) are less understood.
  • Fat-free mass (FFM) and basal metabolic rate (BMR) are known contributors to energy expenditure (EE) and EI.
  • Emerging evidence suggests a correlation between higher ER and increased EI.

Purpose of the Study:

  • To investigate the relationship between basal metabolic rate (BMR), fat-free mass (FFM), and eating rate (ER) in adults.
  • To test the hypothesis that individuals with higher BMR and energy requirements exhibit higher ERs.

Main Methods:

  • A cross-sectional study involving 272 Chinese adults (91 males, 181 females).
  • Data collected on basal metabolic rate (BMR), fat-free mass (FFM), and eating rate (ER).
  • Statistical analysis to determine associations between BMR, FFM, and ER.

Main Results:

  • Significant positive associations were found between BMR and ER (rs = 0.405, p < 0.001).
  • Significant positive associations were also found between FFM and ER (rs = 0.459, p < 0.001).
  • BMR accounted for approximately 15% of the variation in ER, considered metabolically significant.

Conclusions:

  • The findings suggest a metabolic basis for the correlation between an individual's BMR (and thus energy requirements) and their eating rate.
  • Higher BMR and FFM are associated with faster eating rates in the studied population.
  • Further research is warranted to explore these metabolic links to eating behavior.