My suddenly dodgy knee has planted a seed of doubt about my fitness and ability to cope with the ups and downs of the Pennine Way. It took me a couple of years to get it back to coping with shortish day walks, and as mentioned, I've done many a mile over the last few years without worry.
Several people have stated that it's because I've started cycling to work and this has caused new stress on the joint. I kind of have to agree with them as I've been over doing it on the off road tracks through Richmond Park and along the Thames.
I bought a neoprene knee support in Keswick and managed a number of short walks in the Lakes around Tarn Hows, Castlerigg and Aira Force all without any hassle before returning home. So I'm hoping it's was just a warning to take it easier on the peddling until the joint has time to adjust and strenghten.