More than 50 Tufts University male and female students from athletic teams volunteered to examine the effects of mild dehydration on cognitive performance. Each was assigned to complete team practices either with or without water replacement. Following cognitive tests, those in the “dehydration group” demonstrated higher negative mood ratings and confusion than the hydrated group. Those who had water replacement showed better vigilance and attention than the other group, as well. The amount of mild dehydration (1-2%) experienced by these subjects was similar to what many people experience in their busy, daily lives when they skip drinking sufficient water.
PositiveTip: Help maintain optimal cognitive performance by drinking at least 6-8 glasses a water per day.