Did the above workout with 250m (rest of the track) jog for recovery between reps and full rest between each set.
Got very lactic the last 50m of the last 2 reps of each set consistently. My watch says I was hitting 3:20-3:30 pace on the sprint portions, so basically 400m pace.
Would this workout be good for 400m all the way through the mile? I feel like there is that speed endurance factor there along with the endurance of each set being 1.25 miles of a continuously high heart rate.
I’d love some feedback.