Bike fit / correct riding position

Cyclist see what pros do and mimic them. It's an age old thing, but their training regimes are very, very different to your average mamil.

Yeah, they have better genetics and regimes. x amount of hours to reach goals isn't so different.

The scientific evidence to support additional core strength or functional trunk strength for cyclists is minimal, and most studies suggest that the majority of cyclists get the core strength they need from riding their bikes.

I'd like to see those. There is a widespread belief that 'just riding' can compound problems (hardened muscle, asymmetric movements, stiff bits and weak bits) and there are issues typical to cyclists. Sorting them involves riding less, a program of exercise then getting back on the bike. IME this worked for me.

I don't see how that position suggests I need to make my mind up on winter base training, which Dimi was clearly suggesting should be long, steady miles with no threshold work.

There is a conflict. Ride your bike more, or your turbo more? Mamil or pro, you have x amount of hours remember.