Hydration - General

Sweating results in the loss of both electrolytes (particularly sodium) and water. Orange juice, moderate salting of food in the diet, and sports drinks help replace electrolytes such as sodium, potassium, and chloride lost during sports. 

Surprising, as it may seem, the most important part of an athlete's diet isn't what they eat, it is what and how much they drink. Drinking fluids before, during and after sports is especially important for preadolescent children because they have special fluid needs compared to adults, or even teenagers. As a parent or coach, you are responsible for taking precautions to prevent heat illnesses in exercising children and making sure they drink enough fluids.