One short year ago (or just over), I had just finished C25K and couldn't quite run 5k in 30 minutes. Since this time I have done five 10k "races" and obtained the required bling!
The 10ks were "ok" but not easy, and on the last one, achieved a PB by taking 4 minutes of my previous best, so I am now down to 1min 12.
However, I have noticed recently that I can happily knock out a 5k without thinking about it by just going for a run, and I have just started a HM plan on Garmin with Jeff Galloway (run-walk-run) and have done easy 8k's this weekend and last, in just over an hour (currently on week 5)
So now I'm starting to think that "just popping out for a run" is turning into an 8-10k jaunt around my town and lanes!!
Is it possible that 10k is becoming the new 5k?