I started the couch to 5k programme in the middle of January, now mid way through week 7, running 25 minutes now (4k)!!! I was very surprised at how quickly my fitness increased doing it. HOWEVER...my weigh loss is only catching up now. I couldn't understand how I was doing all this exercise and not losing weight, then I spoke to a friend (total fitness freak) and he told me that unless you eat something, preferably protein, within 30 mins of a workout your body holds on to fat, now I have peanut butter on a ricecake after my runs (syned of course) and it's working, lost 3lbs this week after going nowhere for the last 6 weeks!!!