Intermittent Microclimate Cooling During Exercise-Heat Stress in US Army Chemical Protective Clothing

摘要

The effectiveness of intermittent, microclimate cooling for men who worked in US Army chemical protective clothing (modified mission-oriented protective posture level 3; MOPP 3) was examined. The hypothesis was that intermittent cooling on a 2 min on-off schedule using a liquid cooling garment (LCG) covering 72% of the body surface area would reduce heat strain comparably to constant cooling. Four male subjects completed three experiments at 30 deg C, 20% relative humidity wearing the LCG under the MOPP 3 during 80 min of treadmill walking at 224 + 5 W m(sub -2). Water temperature to the LCG was held constant at 21 deg C.