Cardio ,whats best for cardio?

Question

What works best for cardio ???,am willing to do any type, however i have very weak ankles,been like that since i was a teen ,lots of sprains, etc. so i dont know about running...

at present am walking,and dancing...is a stationary bike good? small house not room for much...

Answer 1

Go swimming.  It's the best exercise you'll EVER get.  

Answer 2

you could get a rebounder. its like a mini trampoline that you jump on and apparently 10 mins jumping is equivalent to a 30 min jog.

Also a rowing machine would be good as unlike a stationary bike it works the arms and stomach as well.