I had a 10 hour surgery that ended at 5:30PM. I was walking at 7:00 the next morning. I had a breakfast of eggs, bacon, toast, pancakes , coffee and orange juice right before I started walking. I was a little tired, but I was never "out of it." I walked every hour just because I was bored, and I just could not stay in that awful bed. My sleep schedule was normal. I read, watched TV, had visitors. Everyone has a different experience. I lift weights every day. I was in tip top physical condition. I stay that way. I eat the correct foods, don't smoke, no alcohol. I EXPECTED to feel good following the surgery. I know some people are have a tough time following surgery. Probably most of it is physical, but some of it just mental. I am just one of those people that just "rubs some dirt on it and keeps playing." That doesn't work for everyone, but it worked for me. I had a heart surgery (PFO closure) to correct a birth defect following a stroke when I was 59, and walked in my room hours after the surgery. Knowing me, I will walk following my autopsy, but I am not in a hurry to try that one out.
Don't expect to feel great, but just try to "stay on top of it" if you can. Recovery is slow. Just let it happen.
James