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The goal of this study was to assess the possible attenuating effects of oral fluid loading on hematological and hemodynamic factors during acute psychological stress in two separate experiments: Experiment 1 assessed the effects of hypotonic fluid loading (water) and Experiment 2 assessed the effects of isotonic fluid loading (Gatorade™). Twenty-eight participants were recruited for Experiment 1, and 28 participants were recruited for Experiment 2. Participants for each experiment completed two test sessions, once in a hypo-hydrated condition (following 12-h fast) and once in a fluid loaded condition (hypotonic or isotonic fluid). During each session, hematocrit (Hct), hemoglobin (Hgb), calculated plasma volume (CPV), heart rate (HR), systolic blood pressure (SBP), diastolic blood pressure (DBP), cardiac output (CO), stroke volume (SV), and total peripheral resistance (TPR) were assessed during a 10-min resting baseline period, 6-min mental arithmetic (MA) task, and a 16-min recovery period. Results for Experiment 1 revealed that the fluid load condition Hct, Hgb, and HR levels were significantly lower in comparison to the hypo-hydration condition, and that Hct, Hgb, and CPV reactivity was greater during the fluid load condition. Results for Experiment 2 revealed that Hct, Hgb, and TPR were lower and CPV, SBP, SV, and CO were higher during the fluid load condition compared to the hypo-hydration condition and that HR, CO, and TPR reactivity was greater during the fluid load condition. Finally, analytic comparisons between the two fluid types revealed that SV and CO levels were significantly greater at baseline and during MA when isotonic fluid was ingested compared to hypotonic fluid ingestion.
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Armstrong, L. E., Kenefick, R. W., Castellani, J. W., Riebe, D., Kavouras, S. A., Kuznicki, J. T., et al. (1997). Bioimpedance spectroscopy technique: Intra-, extracellular, and total body water. Medicine and Science in Sports and Exercise, 29, 1657–1663. PubMed
Berne, R. M., Levy, M. N., Koeppen, B. M., & Stanton, B. A. (2003). Physiology. St. Louis, MO: C.V. Mosby Company.
Brown, C. M., Barberini, L., Dulloo, A. G., & Montani, J. (2005). Cardiovascular responses to water drinking: Does osmolality play a role? American Journal of Physiology. Regulatory, Integrative and Comparative Physiology, 289, R1687–R1692. PubMed
Calabrese, E. J., & Tuthill, R. W. (1985). The Massachusetts Blood Pressure Study, Part 1. Elevated levels of sodium in drinking water and blood pressure levels in children. Toxicology and Industrial Health, 1, 1–10. PubMed
DeLorenzo, A., Andreoli, A., Matthie, J., & Withers, P. (1997). Predicting body cell mass with bioimpedance by using theoretical methods: A technological review. Journal of Applied Physiology, 82, 1542–1558.
Dill, D. B., & Costill, D. L. (1974). Calculation of percentage changes in volumes of blood, plasma, and red cells in dehydration. Journal of Applied Physiology, 37, 247–248. PubMed
Greenleaf, J. E., Geelen, G., Jackson, C. G. R., Saumet, J. L., Juhos, L. T., Keil, L. C., et al. (1992). Vascular uptake of rehydration fluids in hypo-hydration men at rest and exercise (p. 44). Moffett Field, CA: NASA Tech Memo 103942.
Greenleaf, J. E., Jackson, C. G., Geelen, G., Keil, L. C., Hinghofer-Szalkay, H., & Whittam, J. H. (1998). Plasma volume expansion with oral fluids in hypohydrated men at rest and during exercise. Aviation Space and Environmental Medicine, 69, 837–844.
Heitz, U. E., & Horne, M. M. (1997). Fluid, electrolyte, and acid-base balance. St. Louis, MO: Mosby, Inc.
Jern, S. (1991). Effects of acute carbohydrate administration on central and peripheral hemodynamic responses to mental stress. Hypertension, 128, 790–797.
Johnson, H. L., Virk, S. P. S., Mayclin, P., & Barbieri, T. (1992). Predicting total body water and extracellular fluid volumes from bioelectrical measurements of the human body. Journal of the American College of Nutrition, 11, 539–547. PubMed
Khaled, M. A., Kabir, I., Goran, M. I., & Mahalanabis, D. (1997). Bioelectrical impedance measurements at various frequencies to estimate human body compositions. Indian Journal of Experimental Biology, 35, 159–161. PubMed
Kurabayashi, H., Kubota, K., Tamura, J., & Shirakura, T. (1989). A glass of water at night for possible prevention of cerebral infarction. Stroke, 103, 1326–1327.
Lambert, G. P., Chang, R. T., Xia, T., Summers, R. W., & Gisolfi, C. V. (1997). Absorption from different intestinal segments during exercise. Journal of Applied Physiology, 83, 204–212. PubMed
Lipsitz, L. A., Nyquist, R. P., Wei, J. Y., & Rowe, J. W. (1983). Postprandial reduction in blood pressure in the elderly. New England Journal of Medicine, 309, 81–83. PubMed
Mascioli, S., Grimm, R., Jr., Launer, C., Svendsen, K., Flack, J., Gonzalez, N., et al. (1991). Sodium chloride raises blood pressure in normotensive subjects. The study of sodium and blood pressure. Hypertension, 17, 121–126.
Muldoon, M. F., Herbet, T. B., Patterson, S. M., Kameneva, M. A., Raible, R., & Manuck, S. B. (1994). Effects of psychological stress on serum lipids, hemoconcentration, and blood viscosity. Archives of Internal Medicine, 155, 615–620. CrossRef
Murray, R., Bartoli, W., Stofan, J., Horn, M., & Eddy, D. (1999). A comparison of the gastric emptying characteristics of selected sports drinks. International Journal of Sport Nutrition, 9, 263–274. PubMed
Nose, H., Mack, G. W., Shi, X. R., & Nadel, E. R. (1988). Role of osmolality and plasma volume during rehydration in humans. Journal of Applied Physiology, 65, 325–331. PubMed
Patel, R. V., Matthie, J. R., Withers, P. O., Peterson, E. L., & Zarowitz, B. J. (1994). Estimation of total body and extracellular water using single- and multiple-frequency bioimpedance. Annals of Pharmacotherapy, 28, 565–569. PubMed
Patterson, S. M., France, C. R., Prause, L. M., & Gill, M. (2002). Hydration status and cardiovascular psychophysiology. Psychophysiology, 39, S64. CrossRef
Patterson, S. M., Gottdiener, J. S., Hecht, G. M., Vargot, S., & Krantz, D. S. (1993). Effects of acute mental stress on serum lipids: Mediating effects of plasma volume. Psychosomatic Medicine, 55, 525–532. PubMed
Patterson, S. M., Krantz, D. S., Gottdiener, J. S., Hecht, G., Vargot, S., & Goldstein, D. S. (1995a). Prothrombotic effects of environmental stress: Changes in platelet function, hematocrit, and total plasma protein. Psychosomatic Medicine, 57, 592–599. PubMed
Patterson, S. M., Rochette, L. M., France, C. R., France, J. L., & Rader, A. (2006). Effects of predonation water loading on self-reported and actual vasovagal reactions in novice blood donors. Psychosomatic Medicine, 68, A39.
Patterson, S. M., & Spinks, D. E. (2002). Relationship between hydration enhancement and blood pressure: More is better. Psychophysiology, 39, S65.
Patterson, S. M., VanderKaay, M. M., & Arnott, L. F. (2001). Effects of oral fluid loading on hemorheologic and hemodynamic reactivity. Psychosomatic Medicine, 63, 157–158.
Robertson, D., Frohlich, J. C., Carr, R. K., Watson, J. T., Hollifield, J. W., Shand, D. G., et al. (1978). Effects of caffeine on plasma renin activity, catecholamines, blood pressure. New England Journal of Medicine, 289, 181–186.
van Beaumont, W. (1972). Evaluation of hemoconcentration from hematocrit measurements. Journal of Applied Physiology, 32, 712–713. PubMed
- Influence of acute fluid loading on stress-induced hemoconcentration and cardiovascular reactivity
Stephen M. Patterson
Melissa M. VanderKaay
Birgit A. Shanholtzer
Cornelia A. Patterson
- Springer US