You hear a lot about electrolytes in conjunction with sports drinks. Electrolytes help support physical performance so that you can do your best in the gym, on the field, or anywhere else you're engaged in physical activity. There are many types of electrolytes. The most common are chloride, potassium, sodium, calcium, and magnesium.
Electrolytes help trigger muscle contractions, which allow your body to move. They also support nerve impulses, so your brain can communicate more effectively with the rest of the body. Your body loses electrolytes through perspiration, so a well-formulated sports drink can help replenish what you've lost to keep your body functioning optimally.