When you can't take your eyes of the boob tube for one entire Saturday afternoon, are you doing them irreversible damage? Your parents probably told you so, when you were a kid. Were they right?
When you've spent the day enjoying hot dogs off the grill, is it safe to jump right into the pool and show off your butterfly stroke? Or do you need to take a breather -- a 60-minute break, to be exact? See more »
Learn more about what ails you. Here are some common symptoms.See all »