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Energy requirements for space flight.

H W Lane1

  • 1Biomedical Operations and Research Branch, NASA-Johnson Space Center, Houston, TX 77058.

The Journal of Nutrition
|January 1, 1992
PubMed
Summary
This summary is machine-generated.

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Human spaceflight research reveals energy metabolism is similar to Earth, but lean body mass is lost despite adequate nutrition and exercise. Further studies are needed on body mass, diet, and exercise interactions in space.

Area of Science:

  • Space medicine
  • Human physiology
  • Metabolic research

Background:

  • Human spaceflight research is conducted by both the United States and the Soviet Union.
  • Understanding energy metabolism during spaceflight is crucial for astronaut health.

Purpose of the Study:

  • To review available data on energy metabolism in the microgravity environment of space flight.
  • To identify alterations in energy metabolism and body composition during space missions.

Main Methods:

  • Review of existing data on human space research.
  • Analysis of metabolic studies conducted during simulated microgravity (bed rest) and true microgravity.
  • Examination of parameters including energy utilization, energy availability, nitrogen balance, blood glucose, fatty acids, and insulin concentrations.
Keywords:
NASA Center JSCNASA Discipline Regulatory Physiology

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Main Results:

  • Energy utilization and availability in space appear similar to Earth.
  • Despite adequate energy and protein intake and in-flight exercise, lean body mass catabolism (negative nitrogen balance) was observed.
  • Metabolic studies indicated changes in blood glucose, fatty acids, and insulin concentrations during space flight.

Conclusions:

  • Space flight may alter energy metabolism, leading to lean body mass loss.
  • Future research should investigate the interplay between lean body mass, diet, and exercise in space.
  • Further understanding of these interactions is essential for optimizing astronaut health and performance.