Thermal insulation and shivering threshold in Greek sponge divers
Deutscher übersetzter Titel: | Waermeisolierung und Zitterschwelle bei griechischen Schwammtauchern |
---|---|
Autor: | Veicsteinas, Arsenio; Rennie, Donald W. |
Erschienen in: | Journal of applied physiology |
Veröffentlicht: | 52 (1982), 4, S. 845-850, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 8750-7587, 0021-8987, 0161-7567, 1522-1601 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU198205016737 |
Quelle: | BISp |
Abstract
Sublingual temperature (Tor), average skin temperature (Tsk), and skin heat flow (Hsk) were determined in a field study for six Greek sponge divers and seven nondiving controls during head-out immersions at water temperature of 21 degrees C. Wetsuits kept Tsk at 22-28 degrees C for 1-3 h until Tor fell to 36.5-35.5 degrees C and violent shivering (metabolic rate (M) = 100-150 W/m) ended the test. At a steady Tsk, immediately before shivering, overall tissue insulation (It), calculated as (Tor-Tsk)/sk, was linearly related to mean subcutaneous fat thickness (MFT) in both groups without statistical difference between them. The onset of shivering, as detected by a sharp increase of M, occurred at the same Tor for a Tsk of about 26 degrees C, and the relationshipof M vs. Tor (i.e., metabolic sensitivity) was the same for both groups. Contrary to other groups accustomed to diving in cold water, the use of a wetsuit for a long time has evidently prevented cold adaptation in these divers. Verf.-Referat