Original
Exercise is unaffected unless it is so strenuous that you become dehydrated. Caution should be used when exercising in extremely hot and dry conditions, or in conditions which aren't as obvious in requiring liquid intake (swimming, snow/water skiing, hiking on a rainy day, etc). The athlete should bring appropriate liquids to help maintain healthy hydration and electrolyte balance, especially if they will be away from water sources for a prolonged period of time.