Human heat acclimatization in extremely hot environments: A review

During the past decades, physiological responses of the human body in extremely hot environments have been studied. Most research has focused on the human heat tolerance, and assessment of the heat stress. In this context, parameters of environments and physiological parameters were introduced, and important heat stress indexes were explained. This article aims to summarize the progress in the literature concerning heat stress indexes and heat acclimatization. The research priorities should shift to the relationship between human heat acclimatization and the indoor thermal environments. This paper will hopefully aid the understanding of human heat acclimatization in extremely hot environments and guide the future research.