Starting CD after an Op??


Good Evening
Just a quick question.....How long after an operation can you start CD??

My dad had a knee replacement 26th June and wants to start CD, mum should be starting int he next couple of weeks and he really wants to start at the same time.

Mel :D :confused:
Thanks Pea :cool:
D_Q - Why is waiting 3 months suggested?

Sorry to take over this thread - but I need a hip op in jan or feb '07 and want to carry on with CD right up to and straight after. Why not? Who says? Is there an explanation? Given a choice I'd stay on CD while in hospital too, don't know if that's an option though.
Please explain if you can?