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Effects of hyper-hydration on orthostatic tolerance in men and women

Effects of hyper-hydration on orthostatic tolerance in men and women. Alexa brooks Dr. Sara Jarvis Northern Arizona university. Introduction. Interventions Hyper-hydration Salt supplementation Purpose: Determine effects of hyper-hydration with Gatorade on orthostatic intolerance

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Effects of hyper-hydration on orthostatic tolerance in men and women

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  1. Effects of hyper-hydration on orthostatic tolerance in men and women Alexa brooks Dr. Sara Jarvis Northern Arizona university

  2. Introduction • Interventions • Hyper-hydration • Salt supplementation • Purpose: • Determine effects of hyper-hydration with Gatorade on orthostatic intolerance • Hypothesis: • Men and women will show increases in orthostatic tolerance • Relative improvements will be similar between sexes

  3. Methods Subject Characteristics Values are mean±SD, *Significant difference between sexes

  4. Methods 1 L • 2 randomly assigned sessions • Euhydrated • 6 days • normal food intake • Hyper-hydrated • 6 days • 2 L Gatorade/day • Tilt Test

  5. Data Collection • Electrocardiogram • SunTech Tango • BP from brachial artery • Finometer • Beat to beat BP from finger • Chest Strap • Breathing rate • Tilt Test

  6. Results * Significant difference during HUT † Significant difference between sexes * * †

  7. Results † † *Significant difference during HUT † Significant difference between sexes * *

  8. Results † † Significant difference between sexes

  9. Discussion • Salt supplementation • Increases: • Plasma volume • Total peripheral resistance • Orthostatic tolerance • Glucose • Decrease in peripheral resistance • Insulin will cause vasodilation • Things to consider: • Salt supplementation was ~6g/day for 8 weeks • Glucose ingestion was right before tilt

  10. Conclusion Men were more orthostatically tolerant than women. Gatorade did not improve orthostatic intolerance.

  11. Acknowledgements Subjects who participated Dr. Jarvis Personnel of NAU’s Cardiovascular Regulation Lab NAU/NASA Space Grant Internship Arizona Space Grant Consortium

  12. Thank you! Any questions?

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