2007, Piran, Slovenia

Rectal temperature ( o C)
39.5
39.0
38.5
38.0
37.5
37.0
36.5
HT1a HT2a HT3a HT4a HT5
'Satisfactory'
Measurement methods
-30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120
Time (minutes)
Figure 1: Rectal temperature during the Heat Tests in Phase-A
Data presented as the 10-minute mean and 1 SD. Solid squares denote HT1a (n=11); solid
diamonds, HT2a (n=9); solid triangles, HT3a (n=11); solid circles, HT4a (n=12); and no symbols,
HT5 (n=9).
Given the results from Phase-A, a different group of male soldiers (same physical
characteristics as those in Phase-A) undertook five further Heat Tests in Phase-B: HT1b
(‘Low’ work rate and WBGT reduced to 34 °C); HT2b (revised ‘Medium’ work rate and
WBGT, 32 °C), HT2c (revised ‘Medium’ work rate, WBGT, 30 °C and rh, 35%); HT2d
(revised ‘Medium’ work rate, WBGT, 30 °C and rh, 84%); and HT4b (‘Very high’ work rate,
WBGT, 20 °C and Va increased to 1 m·s -1 ). At 120 minutes, HT1b, HT2c, and HT2d were
categorised ‘Conservative’, while HT2b and HT4b were considered ‘Satisfactory’. Tre during
the Heat Tests in Phase-B are shown in Figure 2.
501