On another thread Anth has said that "fixed was never about fashion for me" and "it's still a fantastic way to build fitness".
I'm confident that I have above average fitness for my age and that that will be partly due to the fact I haven't spent too much time sitting in cars or buses.
But I'm certainly not into 'fitness'/gym/'exercise for its own sake' etc.
There are plenty of people on here who have taken up cycling relatively recently and have got fitter, lost weight found different muscles etc.
I'm just wondering whether Anth's 'fixed for fitness' experience just accelerates a 'natural' process - "builds fitness" - (which takes a certain amount of time/miles) or whether some sorts of exercise regime, bikes etc. make a difference(?)