I must say the slightest rise in the road ahead makes me gulp, but once I decided to really give it a go I set myself the challenge of 1 of our smaller local hills (and I do mean hill!) no matter how many attempts it took. My first attempt I got about 3/4 of the way up before having to set up the oxygen tent at the side of the road. Just as I was recovering an old guy went flying past.( When I say old, I'm no spring chicken but this guy made me feel like a teenager!!! ) Not to be beaten I got back on my bike and made the rest of the hill
Next time out I remembered this old man and made it up in 1. Its not a pretty sight, I'm a slow plodder and breathe so loadly I would put a 50 a day smoker to shame, but what a feeling at the top (once back out of the oxygen tent that is!). I must say I have not tackled any since my op, at at the moment I am taking no chances even though it should be no problem but just wait till I get back.
By the way one thing that helped tremendoulsy was switching tyres to slicks, if you havent done so already it may be worth the investment.