That seemed to be the theme of this morning's run. My calves, shins, knees and bum just did not want to wake up! The lungs were doing a great job but they were on their own today. On the plus side I managed 9k and probably could have kept going for quite a while longer but I realise now that 10k in under 60 mins is going to take quite some time to achieve.
It really doesn't help that I am paranoid about my footing in the dark. I very nearly tripped twice this morning thanks to a tree root and a raised manhole cover!