Relationship between body heat content and finger temperature during cold exposure

Defence and Civil Institute of Environmental Medicine, Toronto, Ontario, Canada M3M 3B9 The purpose of the present experiment was to examine the relationship between rate of body heat storage ( ), change in body heat content ( H b ), extremity temperatures, and finger dexterity. , H b , finger skin...

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Bibliographic Details
Published in:Journal of applied physiology (1985) 2001-06, Vol.90 (6), p.2445-2452
Main Authors: Brajkovic, Dragan, Ducharme, Michel B, Frim, John
Format: Article
Language:English
Subjects:
Adult
Algorithms
Biological and medical sciences
Body Temperature - physiology
Calorimetry
Cold Temperature
Correlation analysis
Fingers - physiology
Fundamental and applied biological sciences. Psychology
Hands
Heat
Humans
Male
Psychomotor Performance - physiology
Pulmonary Gas Exchange - physiology
Temperature
Thermogenesis - physiology
Thermoregulation. Hibernation. Estivation. Ecophysiology and environmental effects
Vertebrates: anatomy and physiology, studies on body, several organs or systems
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Summary:Defence and Civil Institute of Environmental Medicine, Toronto, Ontario, Canada M3M 3B9 The purpose of the present experiment was to examine the relationship between rate of body heat storage ( ), change in body heat content ( H b ), extremity temperatures, and finger dexterity. , H b , finger skin temperature (T fing ), toe skin temperature, finger dexterity, and rectal temperature were measured during active torso heating while the subjects sat in a chair and were exposed to 25°C air. and H b were measured using partitional calorimetry, rather than thermometry, which was used in the majority of previous studies. Eight men were exposed to four conditions in which the clothing covering the body or the level of torso heating was modified. After 3 h, T fing was 34.9 ± 0.4, 31.2 ±   1.2, 18.3 ± 3.1, and 12.1 ± 0.5°C for the four conditions, whereas finger dexterity decreased by 0, 0, 26, and 39%, respectively. In contrast to some past studies, extremity comfort can be maintained, despite that is slightly negative. This study also found a direct linear relationship between H b and T fing and toe skin temperature at a negative H b . In addition, H b was a better indicator of the relative changes in extremity temperatures and finger dexterity over time than . finger dexterity; torso heating; heat storage; heat loss
ISSN:8750-7587
1522-1601
DOI:10.1152/jappl.2001.90.6.2445