👉 The marathon fluid, also known as the "runner's fluid," refers to the essential electrolytes and fluids that the body loses through sweat during prolonged, intense physical activity like marathons. These losses include sodium, potassium, magnesium, calcium, and chloride ions, which are crucial for maintaining proper hydration, nerve function, muscle contraction, and overall physiological balance. To prevent dehydration, electrolyte imbalances, and muscle cramps, marathon runners must replenish these fluids through a combination of water and electrolyte-rich beverages or foods, such as sports drinks, coconut water, or electrolyte tablets, tailored to their specific sweat rates and sodium losses.
