If the doctor said you wont be able to ride more than a block, after the incisions heal which should take less than 6 weeks, ride a half a block out and a half a block back until you build your stamina. Then increase it to 2 blocks and so on and so forth.
Question, is the doctor a cyclist? If not, then what the hell does he know about it?
I had carpal tunnel surgery and was told no cycling for 8 weeks. Of course the doctor did not tell me this until after the surgery, even though he knew I am a cyclist. I more or less told him yeah right. I back on the bike in a week with no pain or discomfort from riding. Had the doctor said no cycling for 8 weeks before my surgery I would have fired him and found another one.