Your body may do several things to decrease the amount of water. This includes sweating, urinating, or even vomiting. Too much water could also cause stomach cramps.
Drinking too much water during excercise will lead to the body response of finding the way to recuperate homeostasis. Other than liberating more water than in a normal situation, the body will tend to have cramps; not only stomach cramps but cramps in the extremities.
The reason is that this low amount of sodium also results in a small amount of potassium and with the excess of water liberated by transpiration, most of all extremities will tend to have cramps.
The Hypothalamus is responsible for licking and eating reflexes. The licking reflex is seen only certain animals but the centers are located in the medulla oblongata in the lower brainstem.
