I had been warned!! What was that all about. The first short run, and it was OK, but not as OK as I thought it would be. The next one - 8 minutes, and when Laura said I'd done 4, I though I might as well stop then and there, particularly when she said I should be feeling fine. I wasn't!! - but as always, keep going - one more step, then one more, and I managed it. The up side: My new shoes were brilliant!!