When I started actively trying to lose weight and get back in shape last year (right about the time I first joined SparkPeople), I weighed 251, was having sciatica attacks, and could barely move around. I was so out of shape, I had trouble going on an actual walk, so I bought a Wii, along with Wii Sports and Wii Fit Plus, and started with those. After two months, I was twenty pounds lighter and could then start a walking regimen. If you can't walk, Wii, but move!
After two months, I started walking once or twice around our small rural farm. My husband finally mowed for me a walking course, so I wouldn't get bored doing the same path all the time. That progressed to jog/walking on our rural road. I quit for winter,(bad idea!) so starting again!