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Exposure to acceleration during manned spaceflight.

C C Harling1

  • 1Institute for Space Biomedicine, The University of Sheffield.

Journal of the British Interplanetary Society
|August 1, 1989
PubMed
Summary

Spaceflight involves reduced gravity (microgravity) and significant acceleration phases. This study examines the physiological effects of these high-acceleration periods during space missions.

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Area of Science:

  • Space medicine
  • Human physiology
  • Aerospace engineering

Background:

  • Space flight exposes astronauts to microgravity and high-acceleration forces during launch and re-entry.
  • The medical effects of microgravity are extensively documented, but less is known about the impact of high-G forces.
  • Physiologists classify acceleration periods in spaceflight as long-duration due to their physiological significance.

Purpose of the Study:

  • To investigate the biological consequences of increased acceleration experienced during space flight.
  • To understand the physiological responses to the high-G forces encountered during ascent and descent.
  • To provide a comprehensive overview of the effects of acceleration on human health in space.

Main Methods:

  • Review of existing physiological data on human responses to acceleration.
  • Analysis of medical records from astronauts concerning launch and re-entry phases.
  • Biomechanical modeling of G-force effects on human systems.

Main Results:

  • High-G exposure during ascent and descent can induce significant physiological stress.
  • Cardiovascular and neurological systems are particularly vulnerable to these forces.
  • The duration and intensity of acceleration impact the severity of biological consequences.

Conclusions:

  • Acceleration phases are critical determinants of astronaut health and performance.
  • Further research is needed to mitigate the adverse effects of high-G forces.
  • Understanding these effects is crucial for ensuring astronaut safety in long-duration space missions.

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