I'm interested. I have severe arthritis of the spine. I don't know what excercises to do. It's hard to walk, but I love walking. Winter has kept me in the house, and finances keep me from getting a treadmill.
I would love a treadmill, too. We have a teeny condo, so we don't really have the space for one. Someone else said they have feet problems and others suggested water aerobics. I do a program called Walk Away the Pounds on DVD. It's really low impact and they incorporate some arm exercises, too.