Voluntary Dehydration and Electrolyte Losses during Prolonged Exercise in the Heat,

Abstract

The effects of water temperature and flavoring on voluntary dehydration (D), sweat electrolyte losses (SEL) and total body electrolyte losses (TBE) were studied in 12 healthy males during six hours of intermittent exercise at 40.6 C DB, 25.5 C WB. Trials involved three water temperatures (6, 22, 46 C) and two flavorings (Chlorinated and plain). Subjects (Ss) who were presented with 46 C water consumed less (p<0.0001), had a larger % body weight loss (p<0.0001), and a D which was 1050 g larger (p<000.1) than subjects who consumed 6 C. Most of the Na+ was secreted in sweat, while K+ losses primarily originated in urine. Based on 24 hour projections of total body electrolyte balance, K+ depletion was considered to be more likely than Na+ depletion because food can be easily supplemented with sodium chloride.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1984
Accession Number
ADA145157

Entities

People

  • I. V. Sils
  • L. E. Armstrong
  • P. C. Szlyk
  • R. W. Hubbard
  • W. T. Matthew

Organizations

  • United States Army Research Institute of Environmental Medicine

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Behavioral Sciences
  • Body Weight
  • Data Science
  • Digestive System Processes
  • Drinking Water
  • Food
  • Human Behavior
  • Information Science
  • Linear Regression Analysis
  • Military Research
  • Regression Analysis
  • Skin
  • Sodium Compounds
  • Statistical Analysis
  • Statistics
  • Sweat Glands
  • Sweating

Readers

  • Exercise and Sports Science.