altitude training !!!

Just returned from the lake district, thought that I would take a stroll up Helvellyn. After all how hard could a bit of walking be ?? Outrageous ! thats how hard ,even the downhill bits hurt, so I'm sticking to my normal training from now on. Got 11/12 miles booked in for sunday and that will be my lot apart from some gentle bits next week. Left it late to book my accomodation and finally found somewhere just outside Newcastle, I think its closer to Blackpool but you can't have it all ways !