Table 1:

Calculation of some studied variables and indices

Indicator Metabolic rate	Formula Calculated based on standard ISO 8996	Unit W/m2
Basal Metabolic Rate (BMR)	$BMR=66.4730+\left(13.7516\times wb\right)+\left(5.0033\times Hb\right)-\left(6.7550\times A\right)$	Kcal/day
Mean Radiant Temperature (MRT)	$MRT=1.8\sqrt{Va}\left(T_a-T_g\right)$	°C
Dew point (dp)	$dp={\left(\frac{f}{100}\right)}^{1/8}\left(112+0.9T_a\right)+0.1T_a-112$	°C
Universal Thermal Climate Index (UTCI)	UTCI = f(Ta; MRT; Va; RH )	°C
Heat Stress Index (HSI)	$HSI=\frac{Ereq}{\mathit{Emax}}\times 100$	%
Required rate of evaporation for heat balance (Ereq)	Ereq = M−R−C	W/m2
Rate of radiant heat exchange (R)	R = 4.4(35−ta)	W/m2
Rate of convective heat exchange (C)	$C=V_a^{0.6}\left(35-t_a\right)$	W/m2
Maximum evaporation achieved under hypothetical conditions (Emax)	$E_{\mathit{max}}=7\times V_a^{0.6}\left(56-Pa\right)$	W/m2
Predicted heat strain (PHS)	Calculated based on standard ISO7933	W/m2
Humidex (HD)	$HD=T_a+0.5555\left[6.11e^{5417.7530\left(\frac{1}{273.16}\frac{1}{273.15+T_{dew}}\right)}-10\right]$	°C
Subjective Temperature Index (STI)	$STI=Mrt+\left\{{\left[\frac{{\left|S\right|}^{0.75}}{\left(sh.\sigma \right)+{273}^4}\right]}^{0.25}-273\right\}$	°C
Thermal insulation of clothing	Calculated based on standard ISO-9920 (2007).	Clo