Paul's Runs (Run 2 - Tempo Run) 42 [5] 4.6 km (9 / km)
5-10 min warmup at a slow jog on treadmill, then ramped it up to 5min/km pace, couldn't keep it up for a full km, around 600-700m, then had a 3 min walk. Did 6 such reps, then a 5 minute cool down walk.
Interesting that I couldn't keep that pace up, when my best 3k is just over 15 minutes. Perhaps a reflection of the fact that I haven't done much speedwork if any for most of this year. Look forward to seeing improvement in this area as time goes on.