That was a hard one, I felt a little warm before starting so wasn't too surprised when I started sweating earlier than usual I was surprised on the amount of sweating though, I was sweating more than Jimmy Carr in tax court, it was that bad.
At one point I lost my breathing and had to make a concerted effort to get it back under control, then about 16-17 minutes in I felt sick, I admit, I did slow to a brisk walk until I got over the initial sicky feeling but then resumed normal service but I completed the run and I added double the time I spent walking (I added an extra minute to be sure but it was no more than 30 seconds walking) I finished the warm down walk and then had to sprint.
So I have a stomach bug, brilliant, I did finish W7R1 if you don't count the 30 seconds I had to walk to avoid being sick (BUT I did jog for an extra minute to make up for it).
That's why I felt hot to start with, why I was sweating earlier and more than normal. I hope this thing passes quickly, I have targets to meet (graduate C25K) and work to do (regulate my outdoor pace).