My doctor has put me on a 1000 calorie per day diet...  PLEASE READ DETAILS!? Due to a dibilitating illness five years ago and complications from it, I am approximately 150lbs. overweight.  At 5'3", this is considered morbidly obese, and now that I am finally committed to doing something about it in an effort to improve my overall health, my doctor has prescribed this diet, which also limits salt and sugar, due to diabetes and high blood pressure running in my family.  I am unable to do much exercise due to my range of mobility being limited from the complications of my illness, so my questions are as follows...  a)Is this diet safe?  I don't know ANYONE who lives on 1000 calories per day, and am finding this diet extremely difficult to adhere to, as there are tons more things you are NOT allowed to have than you are.  b)Does anyone have any advice about exercise options for someone with physical limitations?  Any advice would be greatly appreciated, as my weight is contributing to various other health problems, and I have my three children to consider.

Summarized question: Is a 1000 calorie per day diet safe?