Speed endurance workout
1 mile warmup: 7:45
-1600 at ~5k pace: 5:56 -- Jog 800 m
-1200 at ~2sec/400 faster: 4:28 -- Jog 600 m
-800 at ~2sec/400 faster: 2:50 -- Jog 400 m
-400 at ~2sec/400 faster: 1:20 -- Jog 200 m
-200 all out: 0:33 -- Jog 100 m
-100 all out: 0:14
1 mile cooldown: 7:49
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