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Hypohydration and heat acclimation: plasma renin and aldosterone during exercise.

Abstract

This study was designed to assess the effects of hydration, acclimation, environment, and exercise on plasma levels of renin and aldosterone. Sixteen subjects exercised (1.34 m X s-1), both pre- and postacclimation, when euhydrated or hypohydrated (-5% of body wt) in a comfortable (20 degrees C, rh = 40%), hot-wet (35 degrees C, rh = 79%), or hot-dry (49 degrees C, rh = 20%) environment. Although light exercise in a thermoneutral environment had no effects on plasma levels of renin activity (PRA) or aldosterone (ALD), exercise in both hot environments resulted in significantly increased levels of both. Increments in both PRA and ALD were greater when hypohydrated, and PRA effects were significantly moderated by heat acclimation in both the euhydration and hypohydration experiments. Although PRA and ALD responses were generally correlated, acclimation did not consistently attenuate ALD increments. We concluded that hydration state, acclimation level, and environmental conditions all affected the responses of PRA and ALD to light exercise.

Authors

No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

6363364

Citation

Francesconi, R P., et al. "Hypohydration and Heat Acclimation: Plasma Renin and Aldosterone During Exercise." Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology, vol. 55, no. 6, 1983, pp. 1790-4.
Francesconi RP, Sawka MN, Pandolf KB. Hypohydration and heat acclimation: plasma renin and aldosterone during exercise. J Appl Physiol Respir Environ Exerc Physiol. 1983;55(6):1790-4.
Francesconi, R. P., Sawka, M. N., & Pandolf, K. B. (1983). Hypohydration and heat acclimation: plasma renin and aldosterone during exercise. Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology, 55(6), 1790-4.
Francesconi RP, Sawka MN, Pandolf KB. Hypohydration and Heat Acclimation: Plasma Renin and Aldosterone During Exercise. J Appl Physiol Respir Environ Exerc Physiol. 1983;55(6):1790-4. PubMed PMID: 6363364.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Hypohydration and heat acclimation: plasma renin and aldosterone during exercise. AU - Francesconi,R P, AU - Sawka,M N, AU - Pandolf,K B, PY - 1983/12/1/pubmed PY - 1983/12/1/medline PY - 1983/12/1/entrez SP - 1790 EP - 4 JF - Journal of applied physiology: respiratory, environmental and exercise physiology JO - J Appl Physiol Respir Environ Exerc Physiol VL - 55 IS - 6 N2 - This study was designed to assess the effects of hydration, acclimation, environment, and exercise on plasma levels of renin and aldosterone. Sixteen subjects exercised (1.34 m X s-1), both pre- and postacclimation, when euhydrated or hypohydrated (-5% of body wt) in a comfortable (20 degrees C, rh = 40%), hot-wet (35 degrees C, rh = 79%), or hot-dry (49 degrees C, rh = 20%) environment. Although light exercise in a thermoneutral environment had no effects on plasma levels of renin activity (PRA) or aldosterone (ALD), exercise in both hot environments resulted in significantly increased levels of both. Increments in both PRA and ALD were greater when hypohydrated, and PRA effects were significantly moderated by heat acclimation in both the euhydration and hypohydration experiments. Although PRA and ALD responses were generally correlated, acclimation did not consistently attenuate ALD increments. We concluded that hydration state, acclimation level, and environmental conditions all affected the responses of PRA and ALD to light exercise. SN - 0161-7567 UR - https://www.unboundmedicine.com/medline/citation/6363364/Hypohydration_and_heat_acclimation:_plasma_renin_and_aldosterone_during_exercise_ L2 - https://medlineplus.gov/dehydration.html DB - PRIME DP - Unbound Medicine ER -