Ouch. For me, 5km is something more like...let's calculate it. 400m/3 minutes per lap, so 12.5 laps and 37.5 minutes. I'm not sure I'd be able to pull it off in 30 minutes yet, and I think I remember the days when it took me more than 40 minutes to go that distance.

(Now that I think of it, building my stamina from 2.5 laps to 12.5 took something like three or three and a half years. So if you're anywhere like meeting the goals of the program you're obviously improving faster than I was....)