I did my optimized 7 week 10K runner today. It was a repeat of the last one - 5 min warmup & cooldown walks with a 20 min. run. I didn't struggle as much during the run as I thought I would especially considering I was doing the run 3 days in a row. I'm slow though and covered just over 1.5 mi in 20 min., well maybe a little closer to 1.75 mi. Afterwards, I jogged/walked home; I jogged a total of around 1.5 mi but it was all broken up. Still, that's 3 mi running, close to 5K, just not consecutively. My next run has a total of 25 min. running though it has an interval 3 min. walk in there.