Exercise During Pregnancy?

I just got done watching the news and there was an interesting story about a new study dealing with exercise and pregnancy. The study found that women who exercise 7 hours or more a week (an hour a day) are 78% more likely to develop pre-eclampsia(sp?). This life threatening complication is one of the most common in pregnant women and one of the most worrisome to doctors. The recommended amount of exercise is 1/2 hour a day and if you can't carry on a conversation while you exercise, you are pushing it too hard. One of the best ways to exercise while pregnant is swimming. I consider my daily routines to be enough exercise for me. Even some daily chores can be too much for me and I immediately feel it. So, to all of you pregos out there, take it a little easy.