As it says on my C25K page, I’m not starting from scratch here. Having spent three months gallivanting around New Zealand, Fiji and Australia, I’ve been doing some pretty spectacular practice walks.
Back when I was in hospital, I was weak, but could walk around a little bit. By the time I left, I could walk pretty much normally, but stairs were tricky. A few weeks later, stairs were all good, but I tried to run for a bus and that didn’t go so well.