Answer:
Excess of transpiration and cramps.
Step-by-step explanation:
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.