Thermoregulation and body fluid loss The maintenance of core body temperature is crucial to a marathon runner's performance and health. An inability to reduce rising core body temperature can lead to hyperthermia. In order to reduce body heat, the metabolically produced heat needs to be removed from the body via sweating, which in turn requires rehydration to compensate for. Replacement of fluid is limited but can help keep the body's internal temperatures cooler. Fluid replacement is physiologically challenging during the exercise of this intensity due to the inefficient emptying of the stomach. Partial fluid replacement can serve to avoid a marathon runner's body overheating but not enough to keep pace with the loss of fluid via sweat evaporation. Environmental factors can especially complicate heat regulation.
Thermoregulation and body fluid loss The maintenance of core body temperature is crucial to a marathon runner's performance and health. An inability to reduce rising core body temperature can lead to hyperthermia. In order to reduce body heat the metabolically produced heat needs to be removed from the bo,dy via sweating, which in turn requires rehydration to compensate for. Replacement of fluid is limited but can help keep the body's internal temperatures c.ooler. Fluid replacement is physiologically challenging during the exercise of this intensity due to the inefficient emptying of the stomach Partial fluid replacement can serve to avoid a marathon runner's body overheating but not enough to keep pace with the loss of fluid via sweat evaporation. Environmental factors can especially complicate heat regulation.