Split Rep. Speed Endurance aka neuromuscualr speed endurance…
3x3x60 w/1 min rest and 5 between sets
or you can do regualr split runs such as..
200 rest 90″ 100 resting 10 mins between sets..
or 150 rest 1′ 150
Be creative and periodize these runs so they eventually turn into a session such as 2×300 or 4×150