Journal of Applied Physiology Fuel your research with LabChart
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J Appl Physiol 83: 860-866, 1997;
8750-7587/97 $5.00
This Article
Right arrow Full Text Free
Right arrow Full Text (PDF) Free
Right arrow Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Latzka, W. A.
Right arrow Articles by Pandolf, K. B.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Latzka, W. A.
Right arrow Articles by Pandolf, K. B.

Journal of Applied Physiology
Vol. 83, No. 3, pp. 860-866, September 1997
ENVIRONMENT

Hyperhydration: thermoregulatory effects during compensable exercise-heat stress

William A. Latzka1, Michael N. Sawka1, Scott J. Montain1, Gary S. Skrinar2, Roger A. Fielding2, Ralph P. Matott1, and Kent B. Pandolf1

1 United States Army Research Institute of Environmental Medicine, Natick 01760-5007; and 2 Sargent College of Allied Health Professions, Boston University, Boston, Massachusetts 02215-1610

Received 28 October 1996; accepted in final form 29 April 1997.

Latzka, William A., Michael N. Sawka, Scott J. Montain, Gary S. Skrinar, Roger A. Fielding, Ralph P. Matott, and Kent B. Pandolf. Hyperhydration: thermoregulatory effects during compensable exercise-heat stress. J. Appl. Physiol. 83(3): 860-866, 1997.---This study examined the effects of hyperhydration on thermoregulatory responses during compensable exercise-heat stress. The general approach was to determine whether 1-h preexercise hyperhydration [29.1 ml/kg lean body mass; with or without glycerol (1.2 g/kg lean body mass)] would improve sweating responses and reduce core temperature during exercise. During these experiments, the evaporative heat loss required (Ereq = 293 W/m2) to maintain steady-state core temperature was less than the maximal capacity (Emax = 462 W/m2) of the climate for evaporative heat loss (Ereq/Emax = 63%). Eight heat-acclimated men completed five trials: euhydration, glycerol hyperhydration, and water hyperhydration both with and without rehydration (replace sweat loss during exercise). During exercise in the heat (35°C, 45% relative humidity), there was no difference between hyperhydration methods for increasing total body water (~1.5 liters). Compared with euhydration, hyperhydration did not alter core temperature, skin temperature, whole body sweating rate, local sweating rate, sweating threshold temperature, sweating sensitivity, or heart rate responses. Similarly, no difference was found between water and glycerol hyperhydration for these physiological responses. These data demonstrate that hyperhydration provides no thermoregulatory advantage over the maintenance of euhydration during compensable exercise-heat stress.

core temperature; fluid replacement; glycerol; hydration; sweating; temperature regulation




This article has been cited by other articles:


Home page
 J. Appl. Physiol.Home page
L. B. Baker, J. A. Lang, and W. L. Kenney
Quantitative analysis of serum sodium concentration after prolonged running in the heat
J Appl Physiol, July 1, 2008; 105(1): 91 - 99.
[Abstract] [Full Text] [PDF]

Home page
 J. Am. Coll. Nutr.Home page
B. Murray
Hydration and Physical Performance
J. Am. Coll. Nutr., October 1, 2007; 26(suppl_5): 542S - 548S.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
M. Shibasaki, T. E. Wilson, and C. G. Crandall
Neural control and mechanisms of eccrine sweating during heat stress and exercise
J Appl Physiol, May 1, 2006; 100(5): 1692 - 1701.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
S. A. Kavouras, L. E. Armstrong, C. M. Maresh, D. J. Casa, J. A. Herrera-Soto, T. P. Scheett, J. Stoppani, G. W. Mack, and W. J. Kraemer
Rehydration with glycerol: endocrine, cardiovascular, and thermoregulatory responses during exercise in the heat
J Appl Physiol, February 1, 2006; 100(2): 442 - 450.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
C. O'Brien, B. J. Freund, A. J. Young, and M. N. Sawka
Glycerol hyperhydration: physiological responses during cold-air exposure
J Appl Physiol, August 1, 2005; 99(2): 515 - 521.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Clin. Nutr.Home page
M. N Sawka and S. J Montain
Fluid and electrolyte supplementation for exercise heat stress
Am. J. Clinical Nutrition, August 1, 2000; 72(2): 564S - 572.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
W. A. Latzka, M. N. Sawka, S. J. Montain, G. S. Skrinar, R. A. Fielding, R. P. Matott, and K. B. Pandolf
Hyperhydration: tolerance and cardiovascular effects during uncompensable exercise-heat stress
J Appl Physiol, June 1, 1998; 84(6): 1858 - 1864.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
R. J. Geor and L. J. McCutcheon
Hydration effects on physiological strain of horses during exercise-heat stress
J Appl Physiol, June 1, 1998; 84(6): 2042 - 2051.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Visit Other APS Journals Online