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Table 2 Physiological and psychophysical strains before subjects performing cognitive task after 60 min of control condition (CON) and after 60 min of passive heating condition (HEAT) in tropical group (TR) and Japanese group (JP)

From: Cognitive performance during passive heat exposure in Japanese males and tropical Asian males from Southeast Asian living in Japan

  CON HEAT
TR JP TR JP
T re, °C 37.03 ± 0.07 36.71 ± 0.09a 37.49 ± 0.09b 37.43 ± 0.07b
ΔT re, °C −0.18 ± 0.05 −0.15 ± 0.04 +0.51 ± 0.05b +0.70 ± 0.06a,b
\( \overline{T} \) sk, °C 33.31 ± 0.15 33.34 ± 0.04 35.15 ± 0.20b 34.77 ± 0.19b
\( \dot{M} \) sw,g cm−2 h−1 20.44 ± 1.23 21.18 ± 1.74 72.42 ± 5.16b 90.39 ± 7.82b,c
TS −0.1 ± 0.1 −0.3 ± 0.2 2.5 ± 0.3b 3.2 ± 0.2a,b
TC 0.2 ± 0.2 0.4 ± 0.2 −1.9 ± 0.2b −2.2 ± 0.2b
Δoxy-Hb (μM) 1.32 ± 0.76 0.95 ± 0.42 14.85 ± 1.25a,b 18.39 ± 1.89b
Δdeoxy-Hb (μM) −0.77 ± 0.27 −0.40 ± 0.15 2.02 ± 0.59 2.19 ± 0.80
Δtotal-Hb (μM) 0.55 ± 0.89 0.49 ± 0.52 16.88 ± 1.71b 21.43 ± 2.15
  1. Data are presented in mean ± standard error
  2. T re rectal temperature, \( \overline{T} \) sk mean skin temperature, ΔT re rise of rectal temperature, \( \dot{M} \) sw total sweat rate, TS thermal sensation, TC thermal comfort, Δoxy-Hb concentration change of oxyhemoglobin, Δdeoxy-Hb concentration change of deoxyhemoglobin, Δtotal-Hb concentration change of total hemoglobin
  3. asignificant difference at P < 0.05 between groups.
  4. bsignificant difference at P < 0.05 between condition
  5. ctendency toward P < 0.1 between groups.