This time it was much much easier. I think it makes a lot of difference to me whether I do my run in the morning, or in the afternoon. I was less fatigued, although my calves felt a bit tight throughout the run.
I had none of the problems with breathing I experienced last week. I was not gasping for air or panting, in fact I breathed through my nose the whole time. I chickened out of running outside as it was far too cold - treadmill will have to do for now.
I felt very satisfied. but could not stop thinking about W4 and the 5-minute runs! Just two more runs to go for this week though, alternating with weight training and elliptical machine on my non-running days - gotta melt that fat.