I myself was going to have a j-pouch. What happened to me was they made an insision just below the breast bone to just below the waist line. So, I have a large scar.Is it deformed,well lets say it adds to a talking point of who has the largest scar conversation.I can live with a scar that's for sure.
As for getting back into shape after surgery,start with baby steps and work your way up.As for boxing, well that's up to you & your doctors.
Have a look at some of the archive sites on this page. Every question you have to ask, will most likely have been asked by someone else. There are also a couple of people who have they own web sites,with regard to procudures & their recoverys.
As for coffee,man I drink to much now that I have an Ileostomy.