Welcome 2 the boards... I'm "physically challenged" as well & have roughly 70 lbs. 2 loose... I've got bad back & a hip replacement w/ arthritis issues just about N every joint. Nonetheless... moving is important 4 the health of your muscles not 2 mention it does help U 2 feel better N terms of more flexible etc.
Use this site 2 help U... Spark has a "Limited Mobility" exercise routines. Just do what U can. If the exercise isn't something U can do... than modify it into something YOU CAN DO! www.sparkpeople.com/resource/lifestyle_cen
Stay positive... U can add me as a friend