Hey, i had gastric bypass April 18th, 2005 and am in need of some at home machineless exercise advice. I have arthritis in my hips, knees and ankles, as well as patella femoral syndrome in my knees, plus i am diabetic, plus i weigh around 400 pounds right now, i have a great deal of leg and back pain, and i have no idea what to do for exercise that doesnt just send me screaming and make me unable to walk or function for days after... HELP!!!