If any of this is real...
Run 3x3x60m on grass, 90 secs between reps, 5 minutes between sets. Over the next weeks drop the 90 to 75 and then 60. Run smooth and fast.
On a different day do 3x3x100m same rests, on the track. Over the next weeks, go to 120s then 150s. Just smooth, around 16 secs per 100 pace.
After all that do some workouts like 250, 220, 180, full blast and full recovery, like 15-18 minutes. Also try 250+150 hard effort with 60 secs rest.