Long Intervals

Thursday is interval day and perhaps the day for a fast 1km. But yesterday I did a fast 12km and it certainly left its mark. My measured 1km was slow and the intervals were very hard going and slowed markedly. At least I've learnt that I am adapted to alternate days of running and putting them back to back is a lot more work. So now, with my goal in mind, I need to look at training on at least some adjacent days.