I have a friend who is now on her 10th week of pregnancy. She had threatened miscarriage when she was on her 7th week. Aside from medications to control uterine contractions, she was also advised to have complete bed rest. Her doctor re-assessed her condition after a week. She no longer have bleeding or spotting but her doctor advised her to be precautious with her activities. What are the recommended exercises for her to maintain good health during her pregnancy? Is exercise still recommended for her?