picking up the pace and eventually the walking breaks went. A few years on, I'm now a marathon runner and gone from a size 14 to between an 8 and a 10. So stick at it, it's worth it in the end. Oh, and by the way,you'll burn a lot more calories outside

it became obsessive. OK, I'm never going to win anything, but I have got satisfactory results from such training. My PBs are 1:37 for a half-marathon (four runs per week), and 3:52 for the marathon. – Mr BumpUse your past experience to inform the present

of paces to choose from as a faster runner. If the slowest anyone can run is say 12-minute miles, a runner who runs a 5K at 10-minute-mile pace won't have the same range of options as someone who can run five-minute miles (since they can run at any speed