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Modification of renin and aldosterone response to heat by acclimatization in man.

Abstract

Plasma renin activity (PRA) and aldosterone concentration (PA) increased in eight men following a brief (30--40 min) heat exposure (50 degrees C dry bulb, 25 degrees C wet bulb) with light work. Sweat loss was less than 1% body weight. Plasma cortisol concentration was unchanged or decreased. In four subjects, a standard heat test was repeated in winter and summer (natural acclimatization). The increase in PRA and PA following heat exposure was less in summer than in winter. Four other subjects were artificially acclimated by daily work periods of 90 min at 50 degrees C for 7 days (artificial acclimation). Heat-induced elevation in PRA was considerably reduced by artificial acclimation, although postheat PA was reduced in only two of the four subjects. The small degree of sweat loss under the conditions of these experiments shows that circulating renin and aldosterone levels are increased in the heat even when a significant sodium deficit is not incurred.

Authors

No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

863817

Citation

Finberg, J P., and G M. Berlyne. "Modification of Renin and Aldosterone Response to Heat By Acclimatization in Man." Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology, vol. 42, no. 4, 1977, pp. 554-8.
Finberg JP, Berlyne GM. Modification of renin and aldosterone response to heat by acclimatization in man. J Appl Physiol Respir Environ Exerc Physiol. 1977;42(4):554-8.
Finberg, J. P., & Berlyne, G. M. (1977). Modification of renin and aldosterone response to heat by acclimatization in man. Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology, 42(4), 554-8.
Finberg JP, Berlyne GM. Modification of Renin and Aldosterone Response to Heat By Acclimatization in Man. J Appl Physiol Respir Environ Exerc Physiol. 1977;42(4):554-8. PubMed PMID: 863817.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Modification of renin and aldosterone response to heat by acclimatization in man. AU - Finberg,J P, AU - Berlyne,G M, PY - 1977/4/1/pubmed PY - 1977/4/1/medline PY - 1977/4/1/entrez SP - 554 EP - 8 JF - Journal of applied physiology: respiratory, environmental and exercise physiology JO - J Appl Physiol Respir Environ Exerc Physiol VL - 42 IS - 4 N2 - Plasma renin activity (PRA) and aldosterone concentration (PA) increased in eight men following a brief (30--40 min) heat exposure (50 degrees C dry bulb, 25 degrees C wet bulb) with light work. Sweat loss was less than 1% body weight. Plasma cortisol concentration was unchanged or decreased. In four subjects, a standard heat test was repeated in winter and summer (natural acclimatization). The increase in PRA and PA following heat exposure was less in summer than in winter. Four other subjects were artificially acclimated by daily work periods of 90 min at 50 degrees C for 7 days (artificial acclimation). Heat-induced elevation in PRA was considerably reduced by artificial acclimation, although postheat PA was reduced in only two of the four subjects. The small degree of sweat loss under the conditions of these experiments shows that circulating renin and aldosterone levels are increased in the heat even when a significant sodium deficit is not incurred. SN - 0161-7567 UR - https://www.unboundmedicine.com/medline/citation/863817/Modification_of_renin_and_aldosterone_response_to_heat_by_acclimatization_in_man_ DB - PRIME DP - Unbound Medicine ER -