I had one kidney removed because of cancer and have a tumor on remaining one with a GFR of 16 and a creatinine level of 3.97. I have chronic back problems and also have a Medtronics implant in my spine that works about 50 t0 60 % I weigh 340 and need to get to 310 to be concidered for transplant but being diabetic it is very hard even though I have pretty good control of my blood sugars my A1C is 6.2 and it took me many years to get to that level. Also had a TIA a few months back but overall I feel fine but don't excercise much