Sper Scientific 800037 WBGT Heat Stress SD Card Logger - Manual (Page 30)

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APPENDICES
WGBT Index and Physical Exercise
WGBT Flag Activity
Intensity
< 26.7°C
( < 80°F) White Normal activity.
Take caution.
26.7 ~ 29.4°C
(80 ~ 84.9°F) Green Discretion is
required in
planning intense
physical activity.
29.5 ~ 31°C
(85 ~ 87.9°F) Yellow Intense activity
for new and
non-acclimated
persons should
be curtailed.
≥ 32.2°C
(≥ 90°F) Black Cancel all
outdoor
exercise.
31.1 ~ 32.2°C
(88 ~ 89.9°F) Red Intense exercise
must be
curtailed for
those with less
than 12 weeks
training in hot
weather. Be on
high alert.