Reply to Anonymous
Shaun - I'd second the idea of an electric assist bike.
I'm a barbie-bum too, though mine stopped being yucky and oozing after 6 months or so. I bought a Decathlon Riverside 500, which is a decent bike, not too heavy, with disk brakes, etc., for €299. For months, I left it in the shed - I just couldn't get up the steep lane from my house to the road - maybe 300 meters! Totally bushed, panting, feeling so pathetic.
Then I converted the front wheel to electric, and my life changed. It took a few months to be able to tackle some of the hills around here, but now I do 20 to 25 km every day it's not raining, at an average of 20 to 22 kph. The kit was from Swytch, by the way, a UK outfit, an absolute doddle to do. But I wouldn't bother doing that today, despite the fact that there are quite a few kits available these days from UK and EU sources. This is because there are some very reasonable ready-to-roll electric (assist) bikes available at the £1,000 - £1,100 mark - check out Decathlon's Riverside 500, 520, and 100 range - in fact, right now there's a "second life" i.e., a refurbished 520 at £999, which is a steal. My bike conversion has the advantage that should electric bits fail, and they will, I can turn it back into an ordinary bike. On the other hand, with the motor in the front wheel and the battery on the handlebars, it's very unbalanced and inclined to roll away when you park it against a wall! The Decathlon one is rear-wheel drive and mid-mounted battery - much better. Obviously, these are pedal assist, not electric bikes with a throttle, which would require a road license, insurance, etc., and are restricted throughout Europe to 250 watts and about 25 kph (you can go faster, but you'll get no help from the electrics). Just that bit of help up hills and accelerating away from lights will put a big smile on your face. Treat yourself - you deserve it!
I can't say I was ever advised to NOT cycle, but while the surgery and the stoma nurse follow-up was superb, there was no discussion or advice on recovery, exercise (apart from NO crunches or other abdominal exercises!), just left to read a few pamphlets. My GP seems to have no idea - I tell him what I want on my prescription, and he dutifully writes it down.