Exercise During First Trimester: Safety & Considerations

Question
I am 6wks preg. and in my last u/s there was a small, 5mm area in my uterine lining which seems to be "unstuck".  The doctor was not too worried and told me to lay around for a week.  Until this point I had reduced my exercise routine to walking for an hour (4xweek), doing lunges intermittenly during walks, prenatal pilates and exercise bands for upper arm exercises.  Before pregnancy I was an avid runner, running 5k about 3-4x week, weight training and step cardio workouts.  Do you think I will have to stop exercising or further lower the strenousness of my exercise routine?  I always wear a heart rate monitor when I walk to be sure my hr does not exceed 140bpm (when I ran I was usually at around 150-155).  Thanks!!

Answer
Exercise is not advised for all high risk pregnancies. If you uterine lining does not go back to normal, then most likely your OBGYN will advise you not to exercise.

I suggest that you get another ultra-sound to monitor the condition and then follow the advise of your OBGYN.