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| Jazyk dokumentu: |
eng
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| Ročník: |
6
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| Číslo: |
5
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| Rozsah (stránky): |
s. 283-288
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| Název zdroje: |
Journal of Occupational and Environmental Hygiene
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| Rok vydání: |
2009
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a new hand-cooling
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| Název: |
A new hand-cooling device to enhance firefighter heat strain recovery
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| Další názvová informace: |
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| Klíčové slovo: |
oděvy ochranné
chlazení
hasiči
reakce tepelné
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| Autor: |
Yang Zhang
Bishop, Phillip A.
Casaru, Catalina
Davis, J. K.
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| Anotace: |
This study tested a new portable cooling device for fire fighting recovery. Participants (N = 8) walked and did arm curls (time-weighted VO2: 1.6 L· min-1 on a treadmill for 40 min in a heated chamber (wet bulb globe temperature: 33.7°C; relative humidity: 40-45%) while wearing firefighter turn-out gear and self-contained breathing apparatus (SCBA). Immediately on finishing exercise, participants recovered for 40 min with either a hand-cooling device or seated passive recovery at an ambient temperature of 22°C, 35% RH in a repeated-measures counterbalanced design. The cooling device had little impact on recovery during the first 30 min; however, compared with passive cooling, the cooling device resulted in significantly lower rectal temperature (Tre) during the last 10 min. Relative to starting Tre of the recovery period, ?Tre at 35 min had fallen 0.51 ± 0.19°C (passive) and 0.76 ± 0.30°C (active) (p = 0.03); and at 40 min ?Tre had fallen 0.63 ± 0.17°C (passive) and 0.88 ± 0.31°C (active) (p = 0.03). Cooling capacity of the device calculated from ?Tre over the whole recovery period averaged about 144% of passive. Reductions in heat storage enhance worker safety and performance in hot environments.
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| Bezpečnostní úroveň: |
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| Druh: |
nezadáno
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