I've completed the w5r1 so far, and I've noticed that every time I begin a new run milestone, I am over cautious about pacing myself, because I *really* don't want to tire myself out. Not being able to judge the pace with respect to the previous one, I end up going slower. Atleast according to the distance I've covered. I've barely increased my run distance in the last 2-3 weeks.
I try to make sure my pace is steady by going with the rhythm of the song that is playing, but when the song changes I'm not sure if I'm still doing the same
But more importantly, I want to, at least, maintain my previous run's pace but I find it hard to judge what that was and also, not go too fast and risk tiring myself out.