A resistance band is a great idea, but make sure you get a full set of exercises on the net or from a Physical Therapist. Working one set of muscles can screw up your joints but good. Take it from a knot-head who did just that.
Someone in the thread was looking for a set of low-impact resistance exercises on the internet, anyone remember who it was? Maybe I was imagining it?
Dom, if you decide to use it, and you can't find anything, I'm sure my wife knows where to get a plan. There's bands in the basement so she must have used them at one time.