Letter | Published:

Heart-rates and the Sub-lingual Temperatures of Heat-acclimatized People

Nature volume 192, pages 10861087 (16 December 1961) | Download Citation

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Abstract

PEOPLE resident at sea-level in the equatorial tropics are considered to be ‘naturally’ acclimatized to heat1. There is evidence that the indigenous peoples of these regions have low forearm blood flows and systolic blood pressures in relation to their surface and deep-body temperatures2–4. This evidence seems to indicate that the cardiovascular systems of heat-acclimatized people are relatively insensitive to increases of body temperature. If this is true, the relationship between the heart-rates and sub-lingual temperatures of tropical people would be expected to differ from that of people who are not acclimatized to heat. The relationship between the heart-rates and sub-lingual temperatures of young English subjects, at rest in a temperate climate, has been investigated by Tanner5. Comparable data are not available for the indigenous peoples of the tropics.

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References

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    , , , and , J. Physiol., 132, 559 (1956).

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    , Proc. Second Cong. Intern. Soc. Bioclimatology and Biometeorology, London, 1960 (Pergamon Press) (in the press).

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    , J. Physiol., 115, 391 (1951).

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Author information

Author notes

    • G. C. WHITTOW

    Present address: Department of Physiology, The Hannah Dairy Research Institute, Ayr, Scotland.

Affiliations

  1. Department of Physiology, University of Malaya, Singapore.

    • G. C. WHITTOW

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DOI

https://doi.org/10.1038/1921086a0

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