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Decompression sickness and the role of exercise during decompression.

K V Kumar1

  • 1Institute of Aviation Medicine, Vimanapura, Bangalore, India.

Aviation, Space, and Environmental Medicine
|November 1, 1988
PubMed
Summary

Exercise during decompression at altitude significantly increases the risk of decompression sickness (DCS), commonly known as the bends. This risk is heightened even with moderate exercise at lower altitudes when breathing ambient air during decompression.

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Area of Science:

  • Physiology
  • Aerospace Medicine
  • Environmental Health

Background:

  • Decompression sickness (DCS) risk is known to increase with exercise at altitude.
  • The specific role of exercise during the decompression phase itself remains less understood.
  • Altitude DCS commonly manifests as 'the bends', a painful symptom.

Observation:

  • A case study details an individual experiencing 'the bends' during accidental decompression while exercising on a treadmill.
  • The event occurred at a simulated altitude of 4,572 m (15,000 ft) within a hypobaric chamber.
  • The individual breathed ambient air without pre-oxygenation throughout the exposure.

Findings:

  • Exercise during decompression, even at moderate intensity and lower altitudes, can predispose individuals to DCS.

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  • Hypoxia and physical exertion during decompression are key factors contributing to DCS risk.
  • Individual susceptibility likely plays a role in the manifestation of altitude-related DCS.

    • Implications:

    • Findings suggest that protocols for altitude exposure should consider the risks associated with exercise during decompression.
    • Awareness of DCS risk is crucial for individuals undertaking activities at altitude, particularly in military or aviation contexts.
    • Further research into individual susceptibility factors could refine DCS prevention strategies.