Fluid Balance During Exercise in the Heat With Water, Flavored Placebo, or a Carbohydrate-electrolyte Beverage Intake (The APEX Study)
NCT ID: NCT01893853
Last Updated: 2022-09-15
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
NA
24 participants
INTERVENTIONAL
2012-10-31
2013-10-31
Brief Summary
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Detailed Description
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The participants will be assigned each arm in a randomized, counterbalanced, cross-over fashion separated by at least 2 weeks. Participants will be placed in a heated environment for the duration of the exercise intervention.
Conditions
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Study Design
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RANDOMIZED
CROSSOVER
BASIC_SCIENCE
TRIPLE
Study Groups
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Water
Electrolyte- and mineral-free water with exercise intervention
Exercise Intervention
Exercise intervention trials will consist of a steady-state bout of exercise at \~70% VO2peak and a timed performance test on a cycle ergometer in a heated environment.
Placebo
Calorie- and electrolyte-free, sweetened flavored water with exercise intervention
Exercise Intervention
Exercise intervention trials will consist of a steady-state bout of exercise at \~70% VO2peak and a timed performance test on a cycle ergometer in a heated environment.
Carbohydrate-electrolyte beverage
Commercially-available flavored beverage carbohydrate-electrolyte beverage with Exercise Intervention
Exercise Intervention
Exercise intervention trials will consist of a steady-state bout of exercise at \~70% VO2peak and a timed performance test on a cycle ergometer in a heated environment.
Interventions
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Exercise Intervention
Exercise intervention trials will consist of a steady-state bout of exercise at \~70% VO2peak and a timed performance test on a cycle ergometer in a heated environment.
Eligibility Criteria
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Inclusion Criteria
* Healthy (No uncontrolled disease)
Exclusion Criteria
* No uncontrolled disease
18 Years
35 Years
MALE
Yes
Sponsors
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Pennington Biomedical Research Center
OTHER
Responsible Party
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Principal Investigators
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Timothy S Church, MD, MPH, PhD
Role: PRINCIPAL_INVESTIGATOR
Pennington Biomedical Research Center
Neil M Johannsen, PhD
Role: STUDY_CHAIR
Louisiana State University-Department of Kinesiology
Ronald B Monce, PA-c
Role: STUDY_CHAIR
Pennington Biomedical Research Center
Locations
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Pennington Biomedical Research Center
Baton Rouge, Louisiana, United States
Countries
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References
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Latzka WA, Sawka MN, Montain SJ, Skrinar GS, Fielding RA, Matott RP, Pandolf KB. Hyperhydration: thermoregulatory effects during compensable exercise-heat stress. J Appl Physiol (1985). 1997 Sep;83(3):860-6. doi: 10.1152/jappl.1997.83.3.860.
Latzka WA, Sawka MN, Montain SJ, Skrinar GS, Fielding RA, Matott RP, Pandolf KB. Hyperhydration: tolerance and cardiovascular effects during uncompensable exercise-heat stress. J Appl Physiol (1985). 1998 Jun;84(6):1858-64. doi: 10.1152/jappl.1998.84.6.1858.
Armstrong LE, Costill DL, Fink WJ. Influence of diuretic-induced dehydration on competitive running performance. Med Sci Sports Exerc. 1985 Aug;17(4):456-61. doi: 10.1249/00005768-198508000-00009.
Cheuvront SN, Carter R 3rd, Castellani JW, Sawka MN. Hypohydration impairs endurance exercise performance in temperate but not cold air. J Appl Physiol (1985). 2005 Nov;99(5):1972-6. doi: 10.1152/japplphysiol.00329.2005. Epub 2005 Jul 14.
Greenleaf JE, Sargent F 2nd. Voluntary dehydration in man. J Appl Physiol. 1965 Jul;20(4):719-24. doi: 10.1152/jappl.1965.20.4.719. No abstract available.
Hubbard RW, Sandick BL, Matthew WT, Francesconi RP, Sampson JB, Durkot MJ, Maller O, Engell DB. Voluntary dehydration and alliesthesia for water. J Appl Physiol Respir Environ Exerc Physiol. 1984 Sep;57(3):868-73. doi: 10.1152/jappl.1984.57.3.868.
Hamilton MT, Gonzalez-Alonso J, Montain SJ, Coyle EF. Fluid replacement and glucose infusion during exercise prevent cardiovascular drift. J Appl Physiol (1985). 1991 Sep;71(3):871-7. doi: 10.1152/jappl.1991.71.3.871.
Nose H, Mack GW, Shi XR, Nadel ER. Role of osmolality and plasma volume during rehydration in humans. J Appl Physiol (1985). 1988 Jul;65(1):325-31. doi: 10.1152/jappl.1988.65.1.325.
Nose H, Mack GW, Shi XR, Nadel ER. Involvement of sodium retention hormones during rehydration in humans. J Appl Physiol (1985). 1988 Jul;65(1):332-6. doi: 10.1152/jappl.1988.65.1.332.
Wilk B, Bar-Or O. Effect of drink flavor and NaCL on voluntary drinking and hydration in boys exercising in the heat. J Appl Physiol (1985). 1996 Apr;80(4):1112-7. doi: 10.1152/jappl.1996.80.4.1112.
Rivera-Brown AM, Gutierrez R, Gutierrez JC, Frontera WR, Bar-Or O. Drink composition, voluntary drinking, and fluid balance in exercising, trained, heat-acclimatized boys. J Appl Physiol (1985). 1999 Jan;86(1):78-84. doi: 10.1152/jappl.1999.86.1.78.
Wemple RD, Morocco TS, Mack GW. Influence of sodium replacement on fluid ingestion following exercise-induced dehydration. Int J Sport Nutr. 1997 Jun;7(2):104-16. doi: 10.1123/ijsn.7.2.104.
Szlyk PC, Sils IV, Francesconi RP, Hubbard RW, Armstrong LE. Effects of water temperature and flavoring on voluntary dehydration in men. Physiol Behav. 1989 Mar;45(3):639-47. doi: 10.1016/0031-9384(89)90085-1.
Vrijens DM, Rehrer NJ. Sodium-free fluid ingestion decreases plasma sodium during exercise in the heat. J Appl Physiol (1985). 1999 Jun;86(6):1847-51. doi: 10.1152/jappl.1999.86.6.1847.
American College of Sports Medicine; Sawka MN, Burke LM, Eichner ER, Maughan RJ, Montain SJ, Stachenfeld NS. American College of Sports Medicine position stand. Exercise and fluid replacement. Med Sci Sports Exerc. 2007 Feb;39(2):377-90. doi: 10.1249/mss.0b013e31802ca597.
Mitchell JW, Nadel ER, Stolwijk JA. Respiratory weight losses during exercise. J Appl Physiol. 1972 Apr;32(4):474-6. doi: 10.1152/jappl.1972.32.4.474. No abstract available.
Brisson GR, Boisvert P, Peronnet F, Perrault H, Boisvert D, Lafond JS. A simple and disposable sweat collector. Eur J Appl Physiol Occup Physiol. 1991;63(3-4):269-72. doi: 10.1007/BF00233860.
Buono MJ, Jechort A, Marques R, Smith C, Welch J. Comparison of infrared versus contact thermometry for measuring skin temperature during exercise in the heat. Physiol Meas. 2007 Aug;28(8):855-9. doi: 10.1088/0967-3334/28/8/008. Epub 2007 Jul 6.
Armstrong LE, Maresh CM, Gabaree CV, Hoffman JR, Kavouras SA, Kenefick RW, Castellani JW, Ahlquist LE. Thermal and circulatory responses during exercise: effects of hypohydration, dehydration, and water intake. J Appl Physiol (1985). 1997 Jun;82(6):2028-35. doi: 10.1152/jappl.1997.82.6.2028.
Temesi J, Johnson NA, Raymond J, Burdon CA, O'Connor HT. Carbohydrate ingestion during endurance exercise improves performance in adults. J Nutr. 2011 May;141(5):890-7. doi: 10.3945/jn.110.137075. Epub 2011 Mar 16.
Davis JM, Lamb DR, Burgess WA, Bartoli WP. Accumulation of deuterium oxide in body fluids after ingestion of D2O-labeled beverages. J Appl Physiol (1985). 1987 Nov;63(5):2060-6. doi: 10.1152/jappl.1987.63.5.2060.
Other Identifiers
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PBRC 12038
Identifier Type: -
Identifier Source: org_study_id
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