I read it just the other way - do an hour in zone 2 plus an additional 10 minutes of tempo.

I did about a month of that program a year and a half ago, and then when I found a group to ride with in my new town, I ended up blowing it off, since it was more fun to ride with the group on weekends than stickt to the plan. I do think that the program did have a benefit anyway, it got me back in semi-decent shape after a long layoff. (or maybe it was just riding 6 days a week )