erm. I run to work now I work in Brixton. Up the hill, down the hill, down college road, into Brockwell.
Running down the hill is " challenging" in a different way to running up the fucker.
Also: I stink, so it's best to keep moving so I don't offend any one...
I think this is the only valid response.
Maybe add a "yes? I do think that's a great, oh, sorry"