I've been saying it for years.
I am natually very high energy but find that with the pouch I have 'highs' and "lows".
Whenever home I need an afternoon nap, no matter how much or little I slept the night before.
Hubby nicknamed me 'sleepy' when we started dating...I would just go and curl up on the sofa and drift off of be out of breath climbing a flight (not my natural state).
I figured out 3 things. First I need water and lots of it...tons of fluids of all sorts or I wilt. After 2 glasses of water I perk right up.
Next, iron levels. I was very low. Took some time but once I got them back up I had more pep.
3. Probiotics...I probably had very low grade pouchitis for a while (set off by long term antibiotic use) ...I did a couple runs of 60 days on chewable probiotics (the only way that I seem to absorb them correctly) and things improved. I went from emptying my pouch 12xs/day or more down to 8 and seem to have gained in energy.
Do not discount the pre-op illness (as Jan said) and the post op recovery time (about 12 months to be back up to full speed)...if after 12 month you are still exhausted then I would have the doctor do bloodwork to check your levels and for underlying infection or inflamation.
Sharon