My friend has recently found out she is pregnant and when she went to her GP she asked about continuing her running, he said that she could carry on as normal until she is 24 weeks. When I was pregnant I kept my heart rate to 140 (although at times it was more like power walking to keep it that low). I remember reading somewhere on this forum that someone had not been advised to keep their heart rate at 140 and now have a very high resting heart rate and can't exercise at all.
I also read on another running site that you should keep your heart below 140 and not exercise for more than 40 minutes at a time.
Now while I am not doubting my fiend's GP, I don't think he has given her the correct advise. I know there are some Dr's/personal trainers out there - what do you advise. I am also interested with a view to the next time I am pregnant. As I said I ran to my heart rate monitor, although I used to find it increasingly frustrating that I usually ended up just walking fast, but I would rather do this than harm the baby.