Activity level

Heat produced (Watts)

Perspiration rate

(cm3/hour)

gm/24hours

Sleeping (cool, dry)

60-80

15-30

360-700

Walking 5km/hr
Comfort zone

280-350

200-500

5-12,000

Hard physical work
(hot, humid)

580-1045

400-1000

10-24,000

Maximum sweat rate
(tolerated for a short time)

810-1160

1600

38,000 plus

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