I had my surgeries at 61, 3 step process. My recoveries from surgeries were good and I have had just minimal issues that most j-pouchers experience. These include butt burn in the beginning (at this point almost 2 years later, not at all), frequent bm's at the beginning but getting progressively better (about 5-6 times a day), low residue diet for a while after surgery (about a month or so) and slowly introducing more food items. Also, some minor issues with leakage and at times emptying the pouch.
Because I had the 3 step, I had 2 different ostomies, an end and a loop-the end was easier and I had it for 7 mos, the loop was a little more challenging but I only had it for eight weeks. I didn't have any real skin issues, but others have experienced that. I was glad to get rid of the stoma and be connected at the final surgery. I had a couple of times that my bag leaked, once at work, not very pleasant. However, after having experienced the bag, if I had to do it, I could manage.
I walked a lot after surgeries, as soon as I could. Since then, I have returned to pretty much all activities, including hiking, biking, swimming. ( Recently hiked to the Summit of Mt. Washington).
I will caution that everyone does not have the same results, with more difficult recoveries etc. It is individual and a 60 year old may have better recoveries than a 25 year old or vice versa. Big thing is to follow your surgeon's instructions and be patient. It is a long process, but things slowly get better, for most people after the first year.
Big decision to make. I never considered a permanent ostomy and I was a good candidate for the j-pouch. Also, had an excellent surgeon.