My exercise plan for when baby is here is walking a ridiculous amount with the pram. As soon as I'm up to it, I will be walking to my MIL each day, have a cup of tea, continue on my mum and have DH pick us up there after work. After a while I'll probably walk back by myself as well. Just slowly increasing the distance is the plan for now.
DH also wants to do a lot of walking with the pram, so when he is off, we can go on walks together.