McMillan Speed Workouts based on 21:41 5k

From McMillan Running Calculator:

Speed Workouts
Long Distance Runners
400m 1:35.2 to 1:40.7 – 9.44 mph to 8.93 mph
800m 3:18.9 to 3:28.2 – 9.04 mph to 8.64 mph
1200m 5:05.8 to 5:21.3 – 8.64 mph to 8.33 mph
1600m 6:56.4 to 7:11.7 – 8.64 mph to 8.33 mph

I’m going to be working with intervals at the 400/800/1200/1600m distances, just to motivate me to do something different.