How should body heat storage be determined in humans: by thermometry or calorimetry?
| Autor: | Gustave Savourey, André L. Vallerand, Jacques Bittel, Anne-Marie Hanniquet |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Adult
Male Physiology Analytical chemistry Thermodynamics Calorimetry Core temperature Auditory canal Body Temperature Physiology (medical) Humans Orthopedics and Sports Medicine Physics Sex Characteristics Weighting coefficient Public Health Environmental and Occupational Health Temperature Skin temperature Heat losses General Medicine Water Loss Insensible Metabolic rate Female Bar (unit) Body Temperature Regulation |
| Zdroj: | European journal of applied physiology and occupational physiology. 65(3) |
| ISSN: | 0301-5548 |
| Popis: | The aim of this study was to determine whether in humans there are differences in the heat storage calculated by partitional calorimetry (S, the balance of heat gains and heat losses) compared to the heat storage obtained by conventional methods (thermometry) via either core temperature or mean body temperatures (\(\bar T_b = 0.8T_c + 0.2\bar T_{sk} \), whereTc is core temperature and\(\bar T_{sk} \) is mean skin temperature) when two different sites are used as an index ofTc [rectal (Tre) and auditory canal (Tac) temperatures]. Since women respond to the heat differently than men, both sexes were studied. After a stabilisation period at thermal neutrality, six men and seven women were exposed to a globe temperature of 50°C, relative humidity of 17% and wind speed of 0.8–1.0 m·s−1 for 90 min semi-nude at rest, whereTre,Tac,\(\bar T_{sk} \), metabolic rate, dry (radiant+convective heat exchange) and evaporative heat losses,S, heat storage byTc (\(S_{T_c } \)) and heat storage by\(\bar T_b (S_{\bar T_b } )\) were assessed every minute. In the men,S was equal to 350.8(SEM 49.6) kJ whereas\(S_{T_c } \) amounted to only 114.6(SEM 16.2) and 196.7(SEM 32.3) kJ forTre andTac, respectively (P |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink