I was doing excercise videos a few times a week -- kickboxing or latin dancing (which is hilarious becuase i"m so uncoordinated) and a yoga / calisthetics mix. The yoga one has a lot of downward dogs and then onto your belly poses, so I'm going to have to find something new, and I can't do kickboxing when I'm pregnant because I'm already loose jointed, and the relaxin just does my hip and knee joints in.
With Ds1 I walked a lot and that was it. With DS2 I walked and did prenatal yoga. I had such a weak core after DS2 that I kept getting sore backs just walking and pulling a wagon, so I started the above routine.
This time I really want to keep my core strong so I don't have so many back problems, so I'm looking into getting a prenatal Pilates video and an aerobics / light weights video (I hear Fit Mama is good -- I'll probably get that). My friend has my prenatal yoga video, I think, or else I lost it, so I might have to get a new one.
I tend to do videos at home or swim, because I hate the gym. I am such a shy excersiser.