Well apparently I can run a km in two minutes!! I had the run keeper ready to go once I'd done my warm up but it must have been recording distance before I pressed the workout button. Then when things were getting quite tough I apparently did a 4 minute km. well the times are clearly up the pole but I think the distances were about right so ran 5.5 km in about 35 minutes on the Stamina podcast. Makes me wonder if I was as fast as I thought I was earlier in the week. Frustrating when you can't trust the data. Anyway I'll repeat both those runs again and see how they compare with what was recorded here. I'm using the free version if RK. Is it telling me I need to upgrade? But GPS is GPS isn't it? It can't read inaccurately on a whim can it? Bother bother bother!