This is the second time I have done C2K and today managed to run for 30 mins on the treadmill relatively easily. Was going to start week 8 28 mins but felt I could manage a full 30 mins. Will need to up the pace a but to get to 5k but amazed how fit I am getting ... and I was 65 yesterday. Once I have finished week 9 will start working towards my first park run at Fountains Abbey. I think what has helped recently has been some new trainers. Bought a pair of Saucony trainers from Up & Running in Harrogate - they are so comfortable and the shop was extremely helpful - would recommend both.