I do yoga/pilates DVDs at home. In fact, when my kids were young I did a lot of exercise videos when I couldn't get outdoors or to a gym to work out. I have a great DVD I do that came with an exercise ball (gaim brand) that builds core strenght that my PT recommended. Its only ~15 minutes but really good. I also do spinervals on my bike in the trainer when its too wet to ride outdoors.