Lesson for the smug

I've read so many posts from runners who have had a bad day. Up to today I could be slightly smug, having had no really difficult runs in my rather limited experience. I should have known that missing the parkrun today, because of the rain and strong winds, showed a lack of spirit that would have to be paid for. So when the sun came out at lunchtime I went for a run to compensate, intending to cover about 5k. I puffed a lot, walked a little, and ran out of go after about 3k. I did start out at a rate which turned out to be 30 sec/km less slow than I am used to but that doesn't excuse the poor performance. This a week after recording my admittedly unimpressive PB in the parkrun. Now I am away for nearly two weeks with no opportunity to put things right. Much work to be done when I return.