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Vascular uptake of rehydration fluids in hypohydrated men at rest and exercise
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hinghofer-Szalkay, H. Jackson, C. G. R. Saumet, J.-L. Greenleaf, J. E. Fegan-Meyer, D. Keil, L. C. Dearborn, A. Geelen, G. Whittam, J. H. Juhos, L. T. |
| Copyright Year | 1992 |
| Description | The purpose of this study was to formulate and to evaluate rehydration drinks, which would restore total body water and plasma volume (PV), for astronauts to consume before and during extravehicular activity, a few hours before reentry, and immediately after landing. In the first experiment (rest, sitting), five healthy men (23-41 yr), previously dehydrated for 24 hr., drank six (1a, 2, 4, 5, 6, 7) fluid formulations (one each at weekly intervals) and then sat for 70 min. Pre-test PV were measured with Evans blue dye and changes in PV were calculated with the hematocrit-hemoglobin transformation equation. This rest experiment simulated hypohydrated astronauts preparing for reentry. The second experiment (exercise, supine) followed the same protocol except four healthy men (30-46 yr) worked for 70 min. in the supine position on a cycle ergometer at a mean load of 71+/-1 percent of their peak aerobic work capacity. This exercise experiment simulated conditions for astronauts with reduced total body water engaging in extravehicular activity. |
| File Size | 2363153 |
| Page Count | 52 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19930016944 |
| Archival Resource Key | ark:/13960/t3b042r0x |
| Language | English |
| Publisher Date | 1992-08-01 |
| Access Restriction | Open |
| Subject Keyword | Aerospace Medicine Physical Exercise Cardiovascular System Ergometers Drinking Extravehicular Activity Dehydration Males Electrolyte Metabolism Hormone Metabolisms Blood Plasma Body Fluids Work Capacity Human Beings Blood Volume Human Performance Supine Position Astronauts Loads Forces Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
