I am considering having surgery in December, but the main reason why I don't want to is because I am so afraid of losing LBM. I will probably need about 4 weeks off from the gym (I can't even miss 1 day without getting pissy), and I'm curious how much LBM I can expect to lose. Post surgery I plan to eat my face off and drink several protein shakes a day. Any other advice from people who have been through a surgery? Any help is greatly appreciated.