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International Journal of Interdisciplinary Research

Table 2 Subjective responses, sweat rate and clothing microclimate humidity for the firefighters

From: Influences of partial components in firefighters’ personal protective equipment on subjective perception

Parameter Experimental condition N = 8
1. Control 2. Full PPE 3. No SCBA 4. No helmet 5. No gloves 6. No boots 7. No jacket/pants (NoJP) 8. No helmet/gloves/boots/SCBA (NoHGBS)
Thermal comfort in exercise −0.50 ± 1.07* −1.75 ± 1.16 −1.38 ± 1.06 −1.75 ± 1.16 −1.50 ± 1.07 −1.50 ± 1.31 −0.88 ± 0.64 −1.13 ± 0.99
Thirst sensation in recovery 1.0 ± 0.9 1.6 ± 0.7 1.1 ± 0.6 1.2 ± 0.6 1.2 ± 0.6 1.0 ± 0.6 0.8 ± 0.6* 0.9 ± 0.8*
 Total sweat rate (g) 282 ± 83*** 743 ± 248 711 ± 301 696 ± 206 767 ± 308 600 ± 174 456 ± 131** 532 ± 139
Sweat rate_evaporated (g) 273 ± 76 377 ± 69 363 ± 109 403 ± 301 382 ± 192 329 ± 75 377 ± 124 355 ± 86
Sweat rate_absorbed (g) 10 ± 8*** 366 ± 192 384 ± 197 293.4 ± 170 385 ± 145 270 ± 138 79 ± 48*** 177 ± 70**
Evaporation rate (%)1) 96.9 ± 2.0*** 52.5 ± 7.8 52.7 ± 6.2 55.0 ± 22.4 49.8 ± 9.7 56.4 ± 12.7 82.6 ± 9.0*** 67.4 ± 6.6**
Absorption rate (%)2) 3.1 ± 2.0*** 47.5 ± 7.8 47.3 ± 6.2 45.0 ± 22.4 50.2 ± 9.7 43.6 ± 12.7 17.4 ± 9.0*** 32.6 ± 6.6**
Humidity in clothing at rest (%) 39.0 ± 5.8* 50.5 ± 11.0 38.5 ± 9.5* 38.2 ± 6.4* 43.6 ± 7.5 47.4 ± 4.3 37.7 ± 8.1** 41.2 ± 8.9*
Humidity in clothing in exercise (%) 80.6 ± 4.7*** 95.4 ± 4.5 85.0 ± 7.6*** 94.6 ± 4.0 94.1 ± 4.8 95.9 ± 2.2 87.0 ± 8.3** 94.0 ± 5.0
Humidity in clothing in recovery (%) 75.8 ± 9.2* 99.0 ± 0.1 97.8 ± 1.8 98.7 ± 0.5 99.0 ± 0.0 98.5 ± 1.3 84.5 ± 10.4*** 98.2 ± 1.0
Time to 99%RH in clothing microclimate (min) - 32 38 35 33 33 23 35
Number of person who reached 99%RH 0 8 5 7 8 7 1 4
Covered area (%) 0 100 100 95.1 95.1 93.2 20 83.4
Perceived wetted area in exercise (%) 18.3 ± 13.5*** 71.2 ± 29.2 63.8 ± 30.5 69.7 ± 30.1 56.7 ± 34.4 47.7 ± 23.3* 29.7 ± 11.3*** 60.0 ± 24.6
Perceived wetted area in recovery (%) 6.9 ± 12.6*** 70.9 ± 31.6 65.0 ± 29.9 69.1 ± 32.4 50.6 ± 35.2 51.0 ± 25.6 13.4 ± 18.7*** 57.6 ± 31.7
  1. (Thermal comfort: −2 (Uncomfortable), −1 (A little uncomfortable), 0 (Not both), Thirst sensation: 0 (No thirsty), 1 (A little thirsty), 2 (Thirsty); 1)Evaporation rate (%) = (Evaporated sweat rate (g)/Total sweat rate (g))*100, 2)Absorption rate (%) = (Absorbed sweat rate (g)/Total sweat rate (g))*100); *Significantly different to FullPPE (P <0.05), **Significantly different to FullPPE (P < 0.01), ***Significantly different to FullPPE (P < 0.001).