Everyone needs the right balance of electrolytes to keep their bodies healthy and in top shape. Athletes and people who exercise need them due to increased sweating. Some chronic illness patients may need extra electrolytes due to low blood pressure or low blood volume. Anyone who has been sick with a stomach bug needs extra electrolytes to replenish what they have lost. People who work in the elements, who have hobbies like gardening or swimming, who enjoy biking, boating, hiking or adventure sports may need extra electrolytes, especially on hot days.