^ Don't think I've ever ran a 5:20 mile in training
What sort of pace do you run intervals at (if at all)?
The paces are only ever guides - For me it's as much about having a specific pace that I believe is "best" that the actual pace itself. If you see what I mean.
^ Don't think I've ever ran a 5:20 mile in training. 1/2 mara best 1h23m.
Target 5km and 10km paces look about right.