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Related Experiment Videos

High altitude and nail growth.

M P S Sawhney1

  • 1Department of Dermatology and STD, Command Hospital (SC), Pune-411 040, India.

Indian Journal of Dermatology, Venereology and Leprology
|July 28, 2007
PubMed
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High altitude environments significantly decrease nail growth rates in both native highlanders and lowlanders. Hypoxia and cold are key factors affecting this physiological change.

Area of Science:

  • Physiology
  • Altitude Medicine
  • Environmental Health

Background:

  • Nail growth is a physiological process that can be influenced by environmental factors.
  • High altitude environments present unique challenges including hypoxia and extreme cold.

Purpose of the Study:

  • To investigate the impact of high altitude on linear nail growth rates.
  • To compare nail growth between native highlanders and lowlanders acclimatizing to high altitude.

Main Methods:

  • Linear nail growth was measured in 22 Ladakhi highlanders and 6 lowlander troops at high altitude (3445 m) and in plains.
  • Age-matched comparisons were made between highlanders and lowlanders.

Main Results:

  • A significant decrease in nail growth was observed in both age-matched highlanders (93.11/day) and freshly inducted lowlanders (88.71/day) compared to plains (1191/day).

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  • While highlanders showed slightly higher growth than lowlanders at altitude, the difference was not statistically significant.
  • Nail growth in plains was substantially higher than at high altitude.

    • Conclusions:

    • Hypoxic and extreme cold conditions at high altitude significantly reduce nail growth.
    • Native highlanders may exhibit some degree of acclimatization, as suggested by slightly higher nail growth rates compared to newly arrived lowlanders.