«Even mild dehydration that can occur during the course of our ordinary daily
activities can degrade how we are feeling — especially for women, who appear to be more susceptible to the adverse effects of low
levels of dehydration than men,» says Harris Lieberman, one of the studies» co-authors and a research psychologist with the Military Nutrition Division, U.S. Army Research Institute of Environmental Medicine in Natick, Mass. «In both sexes these adverse mood changes may limit the motivation
required to engage in even
moderate aerobic exercise.