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Analysis of evaporative water loss in the skylab astronauts
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Leonard, J. I. |
| Copyright Year | 1977 |
| Description | Daily evaporative water losses (EWL) during the three Skylab missions were measured using the indirect mass and water balance techniques. A mean inflight EWL of 860 ml/day-m 2 was obtained for nine men who averaged one hour of daily exercise. Although it was expected the EWL would increase in the hypobaric environment of Skylab (1/3 atmosphere), an average decrease from preflight sea level conditions of 11 percent was measured. The results suggest that weightlessness may have been a factor in modifying EWL primarily by decreasing sweat losses during exercise and possibly by reducing insensible skin losses as well. The weightless environment apparently promotes the formation of a sweat film on the skin surface both directly, by reducing heat and mass convective flow and sweat drippage, and perhaps indirectly by inducing measurable biochemical changes resulting in high initial sweating rates. It is proposed that these high levels of skin wettedness favor sweat suppression by a previously described mechanism. |
| File Size | 5497742 |
| Page Count | 77 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19820011940 |
| Archival Resource Key | ark:/13960/t5k980792 |
| Language | English |
| Publisher Date | 1977-12-19 |
| Access Restriction | Open |
| Subject Keyword | Aerospace Medicine Physical Exercise Skin Anatomy Convective Flow Skylab Program Biochemistry Perspiration Weightlessness Water Balance Evaporation Body Fluids Spacecrews Bioastronautics Water Loss Moisture Content Astronauts Heat Transmission Sweat Mass Flow 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 |
