As shown in Table 6, the temperature effect on the four physiological
parameters increased with the increase of temperature,
and the humidity effect increased with the increase of relative
humidity. However, for heart rate in 40 Ce90%-heavy, PSI in
40 Ce90%-moderate and 40 Ce90%-heavy, the effects may
decrease, the reason was that the environment intensity was
beyond the thermoregulatory ability of human body, and people
ended the work in advance