2007, Piran, Slovenia
2007, Piran, Slovenia 2007, Piran, Slovenia
Environmental Ergonomics XII Igor B. Mekjavic, Stelios N. Kounalakis & Nigel A.S. Taylor (Eds.), © BIOMED, Ljubljana 2007 COLD EXPOSURE OF BARE HANDS AT LOW METABOLIC RATES: CAN GLOVES BE REMOVED FOR SHORT PERIODS WHILE WEARING WARM CLOTHES? 624 K. J. Glitz 1 , U. Seibel 1 , U. Rohde 1 , A. Sievert 2 , D. Ridder 3 and D. Leyk 1 Central Institute of the Bundeswehr Medical Service Koblenz, Germany 2 German Sport University Cologne, Germany 3 Research Institute for Communication, Information Processing and Ergonomics Contact person: karljochenglitz@bundeswehr.org INTRODUCTION In the cold, restrictions of manual dexterity are described below a local hand skin temperature of 15°C (Heus et al. 1995). Adequate hand skin temperature can be maintained by gloves or by high metabolic rates, however, gloves may restrict manual dexterity. Therefore, cold acclimated personnel performing jobs with high metabolic rates (e.g. construction workers, workers in cold-storage depots) frequently remove their gloves for short periods to execute delicate manual tasks to compensate for perceived or actual encumbrance. Estimating the practicability of jobs with low metabolic rates in the cold (e.g. steering and control tasks), restrictions of sufficient manual dexterity and reduced thermal comfort have to be expected when gloves are removed. But are manual dexterity or coordination and hand-grip strength really affected by cold exposure while clothes with proper thermal insulation are worn? METHODS Sixteen cold acclimated volunteers (male, 22.2 ±4.8 y; 178 ±6 cm; 74.5 ±8.5 kg; clothes: ~2 clo) were exposed to cold in a climatic chamber (-5°C, vair
Occupational Thermal Problems RESULTS Mean heart rates (x ±SD) were similar under both conditions: 84 ±9 b/min with B and 85 ±8 b/min with G (p>0.05). Neither core nor mean body skin temperatures showed statistical differences between the two conditions: With variant B, tympanic membrane temperature ( x ±SD) decreased from 37.0 ±0.5°C to 35.9 ±0.6°C (p
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Occupational Thermal Problems<br />
RESULTS<br />
Mean heart rates (x ±SD) were similar under both conditions: 84 ±9 b/min with B and 85 ±8<br />
b/min with G (p>0.05). Neither core nor mean body skin temperatures showed statistical<br />
differences between the two conditions: With variant B, tympanic membrane temperature<br />
( x ±SD) decreased from 37.0 ±0.5°C to 35.9 ±0.6°C (p
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