Exercise to reinforce your heart

In early pregnancy,you need to do any exercise. To reinforce your heart, you need to do aerobic exercise 3 times in a week. Do it about 15-20 minutes with medium intensity. Lower your exercise intensity if you feel tired. This aerobic exercise can be walking, riding a bicycle, swimming or aerobic with low impact. Don't start to do exercise/sport you never did before you consult to your doctor.
But you must take care and stay save during do your exercise in your pregnancy time.

How if you take a little movement such crunch, bow, and stepping in place.

You can try this one to be apart of your exercise during pregnancy: 
Sleep on your back with knees bent two. Put your hands behind your head. Contract your abdominal muscles, relax the muscles of the buttocks, so that the belt remains attached to the floor. In that position lift head, neck and shoulders off the floor. rotate right shoulder toward your left knee, the hips remain on the floor. repeat with the opposite movement. This exercise strengthens the abdominal muscles.

OK, perhaps you have your own coach.
So,now you can do your exercise during your pregnancy time to keep healthy, beautiful and happy.