Last week I started adding a 30 minute jog on the treadmill at about a 8:30/km pace in the evenings to help build up my endurance. Last week was full of early mornings and late days, so I didn't get out running nearly as much as I would have liked, but the treadmill workouts helped preserve what little conditioning I've built up so far.
This morning's run felt pretty good, and I can definitely feel my conditioning and endurance improving. The first couple hundred meters or so still feel rough, but once I get out past the ponds, I start getting into a nice stride. The left knee protests though, which is starting to become a somewhat limiting factor in how far I jog before stopping.
Distance: 2.4 km/1.5 miles
Time: ~20 min