I found a YouTube video by searching "Pregnancy exercise" it's posted by doctor cathy. I've been doing the Warm Up which is about 6 minutes, and the Yoga which is about 8 minutes. It's not too difficult, as far as workout videos go. I'm not over weight but i started doing it a few weeks into the second trimester and haven't noticed any adverse affects so far. There may be a few things she does that you may not be comfortable doing, depending on how you are carrying etc. You should watch the video first and see if it's managable for you. She is a very fit lady and she goes pretty quickly so don't worry if you can't keep up the pace, just do your best and listen to your body. I've noticed that after I'm done I usually feel pretty uncomfortable. my mom suggested that i sit in a reclined position with my knees elevated to help the baby move back to where he is comfortable. It's worked for me, and I don't feel as bad sitting around because I already exercised. :)I know a lot of people who really enjoy walking and that can help you to have more energy too. But if the climate where you live isn't condusive to that, it can make it a pain. I know the last thing I want to do right now is go to the gym! Best of luck!