Intervals

Run: 3 x (200m + 400m + 600m)

Rest the exact time it takes you to do each set. EX. 200m run in 35 sec. rest 35 sec then 400m run Etc.

200 400 600

45 1:41 2:36
44 1:40 2:43
45 1:46 2:46

Harder in reality than it looked on paper! Normal ½ mile warmup and cooldown.