It might not inflict sudden death, but much like too many Happy Meals, your home theater could be causing insidious harm to your health. Until our well-intentioned government regulates contrast ratios and sound pressure levels (they are now regulating the volume of TV ads) it's every man, woman and child for themselves. However, there are some things you can do to lessen the effects. Here's a list broken down by body part. When you're done reading it, feel free to go out and have a stretch.