Ooo Vicki, get you with the tight bum.lol. You are doing far more indoor exercise than I ever done. I would do 10 mins bike and about half an hour floor exercises....clam shells,side leg lifts, bridges etc, ten mins standing up exercises then my walking. I personally think the leg exercises are the best thing for strengthening the different areas. You are still using a stick arn't you? It is much more difficult walking for a while when you do feel yourself starting to limp...that's when it's time to turn back methinks.
I don't know why we all hate the clamshells but it is definitely one of the less desired exercises for most of us.lol.