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Glucose is the source of nearly all energy used by organisms. The first step of converting glucose into usable energy is called glycolysis. Glycolysis occurs in the cytosol of the cell over two phases: an energy-requiring phase and an energy-releasing phase. Over the first three steps, glucose is converted into different forms and attached to two phosphate groups donated by two ATP molecules, resulting in an unstable sugar. In the next two stages, the unstable sugar splits into two sugar...
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Energy requirements.

Christian V Hulzebos1, Pieter J J Sauer

  • 1Department of Pediatrics, Division of Neonatology, Beatrix Children's Hospital, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands. c.hulzebos@bkk.umcg.nl

Seminars in Fetal & Neonatal Medicine
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Summary
This summary is machine-generated.

Determining precise neonatal energy needs is crucial for preventing growth issues. Individualized assessment of energy expenditure is vital for optimal infant nutrition and long-term health outcomes.

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Area of Science:

  • Neonatalogy
  • Pediatric Nutrition
  • Metabolic Research

Background:

  • Establishing appropriate energy and nutritional requirements for newborn infants is complex.
  • In-hospital growth retardation affects a significant number of neonates.
  • Neonatal metabolic capacities and accurate measurement methods are essential.

Purpose of the Study:

  • To highlight the challenges in determining adequate energy and nutritional requirements for newborn infants.
  • To emphasize the importance of individualized energy recommendations based on metabolic factors.
  • To underscore the critical role of early energy accretion for neonatal growth and long-term health.

Main Methods:

  • Review of factors influencing neonatal energy requirements, including basal metabolism, growth, and energy expenditure.
  • Discussion of measurement methods for energy balance and body composition.
  • Analysis of challenges in calculating energy needs, particularly for preterm and low birth-weight infants.

Main Results:

  • Neonatal energy requirements are dynamic, influenced by continuous developmental changes.
  • General recommendations for preterm infants can lead to errors due to high variability in energy expenditure.
  • Extremely low birth-weight and very low birth-weight infants are at high risk for negative energy and nutrient balances.

Conclusions:

  • Individualized energy recommendations, ideally based on measured energy expenditure, are necessary for optimal neonatal care.
  • Adequate neonatal nutrition and early energy accretion are fundamental for growth, neurodevelopment, and long-term physical health.
  • Addressing challenges in neonatal nutrition is critical to prevent growth retardation and improve health outcomes.