Following a training programme and just completed my long run for the week - 9.5 miles. Sounds OK, right? But I felt terrible! Really slow at nearly 2 hours and I kept having to stop and walk in last 2 miles. I now feel exhausted and am lying in sofa having tea brought to me. How am I going to add an extra 4 miles in a few weeks without keeling over? I'm basically adding a mile a week to long runs, but they are all awful.