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Related Concept Videos

Energy Balance01:19

Energy Balance

517
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...
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Energy Budgets00:51

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Organisms must balance energy intake with the energy required for growth, maintenance and reproduction. These trade-offs result in a variety of survivorship and reproductive strategies, including semelparity and iteroparity. Semelparous species, like annual plants, have only one reproductive episode in their lifetimes and consequently have short lifespans. Iteroparous species, by contrast, have many reproductive events during their lifetimes but have relatively few offspring. These two...
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Related Experiment Video

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Concept Development and Use of an Automated Food Intake and Eating Behavior Assessment Method
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Predicting energy intake with an accelerometer-based intake-balance method.

Paul R Hibbing1, Robin P Shook1,2, Satchidananda Panda3

  • 1Center for Children's Healthy Lifestyles & Nutrition, Children's Mercy Kansas City, Kansas City, MO64108, USA.

The British Journal of Nutrition
|October 17, 2022
PubMed
Summary
This summary is machine-generated.

This study introduces an accelerometer-based method to measure energy intake (EI) more accurately than subjective methods. The new approach shows promise for tracking dietary changes in interventions like time-restricted eating (TRE).

Keywords:
AccelerometryEnergy balanceInterventionsOverweight/obesityWeight loss

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Area of Science:

  • Nutrition Science
  • Biomedical Engineering
  • Human Physiology

Background:

  • Subjective methods for assessing energy intake (EI) are prone to significant measurement errors.
  • Accurate EI assessment is crucial for evaluating nutritional interventions and understanding energy balance.
  • Existing methods lack precision, necessitating the development of objective and reliable assessment tools.

Purpose of the Study:

  • To develop and validate an accelerometer-based intake-balance method for assessing energy intake (EI).
  • To compare the novel method's EI estimates against a established tool using data from a time-restricted eating (TRE) trial.
  • To evaluate the method's sensitivity to changes in EI and its biological plausibility.

Main Methods:

  • Utilized data from a 12-week TRE intervention involving participants with overweight/obesity.
  • Assessed body composition via DXA and daily energy expenditure (EE) using wrist-worn accelerometers.
  • Calculated EI by summing net energy storage (DXA) and EE (accelerometer), comparing results with the NIDDK body weight planner.

Main Results:

  • The accelerometer-based method detected significant EI reductions in the TRE group (1255 kJ/day, P < 0.01).
  • Both methods showed good group-level agreement but high individual variability (limits of agreement -2414 to +1824 kJ/day).
  • Accelerometer-derived EI estimates were biologically and behaviorally plausible, indicating sensitivity to change.

Conclusions:

  • The accelerometer-based intake-balance method offers a potentially viable alternative to subjective self-report measures of EI.
  • This objective method demonstrates plausible accuracy for assessing energy intake in intervention studies.
  • Further validation using doubly labeled water is recommended to establish criterion validity.