I would love to do (part of) the Camino this year, probably starting in Porto. Question I need to ask... do you have to be extremely fit to attempt it? I'm 60 & normally walk for about an hour every day.. which is not really anywhere close to the distances I'll need to cover on the Camino, but maybe I'll get fitter as I walk? Or is it best to do serious training before even attempting to do the Camino?