ABSTRACT
Physiological reactions to cold temperatures, as with other stimuli, vary greatly from individual to individual. Investigating factors influencing human variation is useful in assessing the environmental adaptability of human beings. Systemic adaptability to cold temperatures (that is, systemic cold tolerance) can be assessed by the ability of the body to suppress heat loss and to produce heat. These abilities are not independent of each other; however, when assessing human variation with respect to cold tolerance, these two abilities need to be investigated separately.
