cramping

The loss of electrolytes such as sodium and potassium through sweat can lead to muscle cramps, nausea, vomiting and even death.  Electrolytes are minerals (sodium, potassium, calcium, magnesium, and chloride) which send messages to nerves and muscles throughout the body,  and are involved with muscle contraction and relaxation during exercise, so that an imbalance can impact the actual contraction of the muscle itself.