Absence of a gender affect on the flow-dependent nature of sweat sodium loss
In other communications at this conference, we have described regional differences in human eccrine sweat secretion rates at rest and during exercise. Such sweat is isotonic, with its principal solutes being sodium, chloride, lactate and potassium (Robinson and Robinson, 1954; Patterson et al., 2000), and it is well established that its electrolyte concentration is a function of sweat secretion rate, both before (Cage and Dobson, 1965) and after heat adaptation (Allan and Wilson, 1971). Indeed, this is a flow-dependent, linear relationship. Herein we focus upon gender differences in the sweat rate of the torso, and how these rates affect the concentration of sodium within that sweat.