The last couple of runs we did 4.5 k. I'm hoping to do one more then thinking of increasing distance again. I know 10% is the recommendation but do you guys think it'll be ok for "next week" to go to 5k , an increase of slightly over 10%? We are taking it very steady, going around 8mins per km (increasing a bit on the last 1/2 k). I felt I could have carried on a bit, but legs aching now! Once we've hit 5k then we need to find out next challenge - upping the pace I reckon!