I had two terrible runs last week and one awful experience on a treadmill. I seemed to pick up lots of aches and niggles, couldn't find the enthusiasm for YouTube yoga either. I was generally feeling maybe running wasn't my thing after all.
Anyway, great run this morning, no pains, no dead thighs, no slumping, no dragging my feet. Really felt good. I've decided after Christmas I'm going to get a gait analysis and buy the best running shoes I can afford and just get on with being a runner.