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Energy expenditure and physical activity in recovering malnourished infants

Russell Rising1, Gul Tiryaki Sonmez

  • 1D & S Consulting Inc., 1 Horizon Rd, #1407, Fort Lee, NJ 07024, USA.

Journal of Nutrition and Metabolism
|August 12, 2010
PubMed

Insights

Recovering malnourished infants exhibit higher energy expenditure and intake compared to healthy infants, suggesting increased energy needs for growth. This study highlights altered metabolic profiles in infant malnutrition.

Area of Science:

  • Pediatrics
  • Human Nutrition
  • Metabolic Research

Background:

  • Infant malnutrition is characterized by reduced body size for age and weight.
  • Understanding the metabolic adaptations in recovering malnourished infants is crucial for effective nutritional interventions.

Purpose of the Study:

  • To determine the 24-hour energy metabolism profiles in recovering malnourished infants.
  • To compare these metabolic profiles with those of similarly aged healthy control infants.

Main Methods:

  • Utilized the Enhanced Metabolic Testing Activity Chamber to measure energy expenditure (EE), sleeping metabolic rate (SMR), respiratory quotient (RQ), and physical activity (PA) over 22 hours.
  • Extrapolated metabolic data to 24 hours and calculated energy intake (EI) and macronutrient distribution.
  • Employed statistical analysis (SPSS, version 13) to identify significant differences between malnourished and control groups (P < .05).

Main Results:

  • Malnourished infants were significantly lighter, had lower body fat percentage, and lower BMI compared to controls.
  • Despite lower body weight, malnourished infants demonstrated significantly higher 24-hour EI and a greater proportion of carbohydrate intake.
  • Malnourished infants exhibited significantly higher 24-hour EE, SMR, and RQ, coupled with lower physical activity levels.

Conclusions:

  • Recovering malnourished infants display elevated energy requirements, indicated by increased energy expenditure and intake.
  • The higher RQ suggests a greater reliance on carbohydrate metabolism.
  • These findings imply that increased energy, potentially from carbohydrates, is necessary to support growth and recovery in malnourished infants.

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