welcome to Fitday and congrats on your decision to change your lifestyle! Sorry to hear about your medical condition. What you could try is swimming or aqua fitness. If you have access to a rowing machine rowing might be an option, too.
Best of luck!
Starting Weight: 130 lbs (04/27/10)
Body Fat: 28.8% (ugh!!!) (10/10/10)
Current Weight: 130 lbs (ugh!!!)
Current Body Fat: ???
Goal Weight: 115 lbs (03/20/11)
Goal Body Fat: 18-20%
Travel is fatal to prejudice, bigotry, and narrow-mindedness. (Mark Twain)