PMID- 2302131
OWN - NLM
STAT- MEDLINE
DCOM- 19900312
LR  - 20081121
IS  - 0095-6562 (Print)
IS  - 0095-6562 (Linking)
VI  - 61
IP  - 1
DP  - 1990 Jan
TI  - Evaluation of three commercial microclimate cooling systems.
PG  - 71-6
AB  - Three commercially available microclimate cooling systems were evaluated for 
      their ability to reduce heat stress in men exercising in a hot environment while 
      wearing high insulative, low permeability clothing. Five male volunteers 
      performed three 180-min experiments (three repeats of 10 min rest, 50 min walking 
      at 440 watts) in an environment of 38 degrees C dry bulb (Tdb), 12 degrees C dew 
      point (Tdp). The cooling systems were: 1) ILC Dover Model 19 Coolvest (ILC), mean 
      inlet temperature 5.0 degrees C; 2) LSSI Coolhead (LSSI), mean inlet temperature 
      14.5 degrees C; and 3) Thermacor Cooling Vest (THERM), mean inlet temperature 
      28.3 degrees C. Endurance time (ET), heart rate (HR), rectal temperature (Tre), 
      mean skin temperature (Tsk), sweating rate (SR), rated perceived exertion (RPE), 
      and thermal sensation (TS) were measured. A computer model prediction of ET with 
      no cooling was 101 min. ET was greater (p less than 0.01) with ILC (178 min) than 
      THERM (131 min) which was greater (p less than 0.01) than LSSI (83 min). The 
      subjects self terminated on all LSSI tests because of headaches. Statistical 
      analyses were performed on data collected at 60 min to have values on all 
      subjects. There were no differences in HR, Tre, SR, or TS values among the 
      cooling vests. The subjects' Tsk was lower (p less than 0.05) for the LSSI than 
      THERM; and RPE values were higher (p less than 0.05) for LSSI than the other two 
      vests. These data suggest an improved physiological response to exercise heat 
      stress with all three commercial systems with the greatest benefit in performance 
      time provided by the ILC cooling system.
FAU - Cadarette, B S
AU  - Cadarette BS
AD  - U.S. Army Research Institute of Environmental Medicine, Natick, MA 01760-5007.
FAU - DeCristofano, B S
AU  - DeCristofano BS
FAU - Speckman, K L
AU  - Speckman KL
FAU - Sawka, M N
AU  - Sawka MN
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Aviat Space Environ Med
JT  - Aviation, space, and environmental medicine
JID - 7501714
SB  - IM
MH  - *Air Conditioning
MH  - Evaluation Studies as Topic
MH  - Hot Temperature
MH  - Humans
MH  - Male
MH  - Physical Exertion
MH  - *Protective Clothing
MH  - Stress, Physiological
MH  - Time Factors
OID - NASA: 90147440
EDAT- 1990/01/01 00:00
MHDA- 1990/01/01 00:01
CRDT- 1990/01/01 00:00
PHST- 1990/01/01 00:00 [pubmed]
PHST- 1990/01/01 00:01 [medline]
PHST- 1990/01/01 00:00 [entrez]
PST - ppublish
SO  - Aviat Space Environ Med. 1990 Jan;61(1):71-6.