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Fluid balance and renal response following dehydrating exercise in well-trained men and women.
Eur J Appl Physiol Occup Physiol. 1996; 72(5-6):468-77.EJ

Abstract

We examined the recovery of plasma volume, plasma osmolality, renal water and sodium handling and fluid-regulating hormones to dehydrating exercise in well-trained women and compared them to men. Ten male and eight female athletes cycled at anaerobic threshold at an ambient temperature of 32 degrees C until dehydration by 3% of their body mass (mb). After exercise, they drank water equal to 1% mb and rested for 240 min. Plasma renin activity (PRA), serum aldosterone [ALDO]s, plasma arginine vasopressin [AVP]pl, norepinephrine concentrations and plasma osmolality (Osmpl) were determined at baseline, end of exercise, 30, 60, 120 and 240 min postexercise. Urine was collected at baseline, end of exercise, 60, 120 and 240 min postexercise. Renal free water and sodium handling were assessed. The recovery of OSMpl and plasma volume occurred within the first 60 min of recovery and at similar rates between the groups. However, women had lower PRA at the end of exercise (P = 0.05), an earlier recovery of [ALDO]s, and a slower [AVP]pl recovery. Overall fluid balance was similar between the men and women, as were the early recovery of renal free water clearance (CH2O). During the last 120 min of recovery CH2O was more negative (greater water reabsorption) and fractional sodium excretion was increased in the women compared to the men. Despite small differences in sodium and water reabsorption following dehydration, it appears from other study that recovery from dehydrating exercise in well-trained men and women is remarkably similar.

Authors+Show Affiliations

Nicholas Institute of Sports Medicine, Lenox Hill Hospital, New York, NY 10021, USA.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

8925818

Citation

Stachenfeld, N S., et al. "Fluid Balance and Renal Response Following Dehydrating Exercise in Well-trained Men and Women." European Journal of Applied Physiology and Occupational Physiology, vol. 72, no. 5-6, 1996, pp. 468-77.
Stachenfeld NS, Gleim GW, Zabetakis PM, et al. Fluid balance and renal response following dehydrating exercise in well-trained men and women. Eur J Appl Physiol Occup Physiol. 1996;72(5-6):468-77.
Stachenfeld, N. S., Gleim, G. W., Zabetakis, P. M., & Nicholas, J. A. (1996). Fluid balance and renal response following dehydrating exercise in well-trained men and women. European Journal of Applied Physiology and Occupational Physiology, 72(5-6), 468-77.
Stachenfeld NS, et al. Fluid Balance and Renal Response Following Dehydrating Exercise in Well-trained Men and Women. Eur J Appl Physiol Occup Physiol. 1996;72(5-6):468-77. PubMed PMID: 8925818.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Fluid balance and renal response following dehydrating exercise in well-trained men and women. AU - Stachenfeld,N S, AU - Gleim,G W, AU - Zabetakis,P M, AU - Nicholas,J A, PY - 1996/1/1/pubmed PY - 1996/1/1/medline PY - 1996/1/1/entrez SP - 468 EP - 77 JF - European journal of applied physiology and occupational physiology JO - Eur J Appl Physiol Occup Physiol VL - 72 IS - 5-6 N2 - We examined the recovery of plasma volume, plasma osmolality, renal water and sodium handling and fluid-regulating hormones to dehydrating exercise in well-trained women and compared them to men. Ten male and eight female athletes cycled at anaerobic threshold at an ambient temperature of 32 degrees C until dehydration by 3% of their body mass (mb). After exercise, they drank water equal to 1% mb and rested for 240 min. Plasma renin activity (PRA), serum aldosterone [ALDO]s, plasma arginine vasopressin [AVP]pl, norepinephrine concentrations and plasma osmolality (Osmpl) were determined at baseline, end of exercise, 30, 60, 120 and 240 min postexercise. Urine was collected at baseline, end of exercise, 60, 120 and 240 min postexercise. Renal free water and sodium handling were assessed. The recovery of OSMpl and plasma volume occurred within the first 60 min of recovery and at similar rates between the groups. However, women had lower PRA at the end of exercise (P = 0.05), an earlier recovery of [ALDO]s, and a slower [AVP]pl recovery. Overall fluid balance was similar between the men and women, as were the early recovery of renal free water clearance (CH2O). During the last 120 min of recovery CH2O was more negative (greater water reabsorption) and fractional sodium excretion was increased in the women compared to the men. Despite small differences in sodium and water reabsorption following dehydration, it appears from other study that recovery from dehydrating exercise in well-trained men and women is remarkably similar. SN - 0301-5548 UR - https://www.unboundmedicine.com/medline/citation/8925818/Fluid_balance_and_renal_response_following_dehydrating_exercise_in_well_trained_men_and_women_ L2 - https://medlineplus.gov/exerciseandphysicalfitness.html DB - PRIME DP - Unbound Medicine ER -