how long after surgery before i can exercise?

my bypass surgery is tomorrow. i have not eaten anything solid for the pass 5 days and will comply with the doctors elimation orders this afternoon. i have been living off my own fat. how long after surgery before i can exercise? i.e. walk.

We greatly appreciate your interest in helping us build our Q&A database. To discourage vandals from posting garbage, however, we require people to register before posting.