Electrolytes are lost through sweat during intense exercise andor high temperatures. When electrolytes are depleted from your body you become tired cramp easily & are at risk for dehydration. When you become even midly dehydrated your health can suffer too. Replacing electrolytes is essential to keep your body hydrated to enhance performance & to help prevent muscle cramps. Electrolytes also help the brain & nervous system transmit & receive important signals & allow the muscles to contract & relax. Some studies show that electrolytes such as potassium & magnesium also support heart function.