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Recent advances in temperature regulation during exercise in humans.

This paper describes first the dynamics of heat transfer from active muscle to the body core and then the physiological regulatory mechanisms that act to modify the rates of heat transfer from core to skin and from skin to environment. After this, nonthermal factors influencing the regulatory mechanisms are described, emphasizing the importance of body fluid status and its influence on the temperature regulatory mechanisms. The control of cutaneous vasomotor and venomotor tone is the shared effector loop of both the blood pressure and temperature regulatory systems; during exercise these systems interact, with the former system predominating when mutually exclusive demands exist. The importance of blood volume is emphasized again in a final discussion of the effects of improved physical condition on the temperature regulatory system.