personnel to make sure they don't have the problems you're hinting at. specifically, cardiac problems, most of which can be picked up by listening to the heart and seeing how the child performs in a high exertion environment. there are some rare occasions though where young athletes have a heart anomaly and you could screen everybody in town but you may not find it. it doesn't make economic sense. check with your doctor. make sure your kids are qualified and drink water when out on the field so they don't develop a heat injury. >> in terms of what to drink, is it just keep hydrating with water? do the power aid drinks help? >> well, there are simple rules f. you will be out in the sun for two hours or less, drink regular tap water. your body knows what to do with fluids. it wants the fluids. typically four glasses every hour. after two hours you have to think about an issue where maybe you are bringing in too much