Really felt good before starting the run but failed epically.
Gold star to those of you who can do this on a treadmill!!!!! My first proper go at doing the programme on the treadmill bur found myself getting overheated in no time at all. 3 minutes into the run I could feel the sweat rolling down my face at which point I was longing for the wind in the open air. I survived to about 17 minutes of the run when the heat was so much I was beginning to feel faint at which point I slowed to a walk which I managed 5 minutes of then felt too bad to carry on. Don't think I'd set the pace too fast as I felt slower than when I run outside and I didn't even have the hills to contend with.
Will get back out in the open air and give it another go on fri