So I enjoy running and cycling and lifting weights (the last in a pretty minor way--only once or twice a week).
I've recently been having problems with one foot; got new orthotics and it's getting worse. The podiatrist told me to give myself 6 weeks to adjust to the new inserts before coming back...that's in 2-3 weeks.
In the meantime, I'm actually having trouble walking and so am not running much. So here's my question:
Besides cycling and swimming, any thoughts on good cardio workouts that don't involve much or any footwork? I suspect the answer's no, but thought the collective brain might yield more than my solo brain.

Thanks!