I realise that interval training is part of c25k and having completed that I have been running all the time during my runs. However recently I have started going back to a walk run format and am finding that my times are coming down. I have also been reading stuff on the Jeff Galloway website. The run walk run system seems to be more motivating to me as i find that when trying to run all the time i gradually grind to a halt even at points running at a slower pace than i would have done walking. I wondered if anybody has continued with interval training after graduation and what your experiences are?