want to do L-S

no john, 200-300 m is the distance of each run.
I did in the past week 300m rest 2’ - 200 m rest 3’, x 2-3 (depend on the fatigue).
and in the other tempo day I did 400 and 300 for max 2!
in the third day I do Charlie circuit (in gpp) and i can do about 1800 m total without fatigue.

I’m not a “fan” of L-S, so If you help me to use a S-l training but can improve my speed endurance…I go to do it.