like It, thanks!
PERIODIZATION (my understanding)
GPP (4-8weeks)
phase 1 : accel (10-30m) + extensive tempo (65-75%intensity)
SPP (8-12weeks)
phase 2: accel + max velocity (30-60m) + intensive tempo (80-85% intensity)
phase 3: accel + max velocity + speed endurance 80-150m (90-95% intensity)
phase 4(if needed): main focus speed endurance 80-150m + speed endurance 2 150-300m (all 90-95% intensity)
also found this http://completetrackandfield.com/archives/