we did something like this once in college.
we did a 45 second timed run all out.
the only person to come close was Lashawn Merrit who made it like 395 meters.
I made 360 meters and i believe one or two others did around the same with 2nd place going about 380 meters.
The problem with this workout is, that you CANT do it 4-5 times a practice. If you do, you certainly cant do it very often.
I remember feeling as if i was gonna die afterward. This practice ranks right up there with the broken 400s (run 300 all out, rest 30 seconds, run 100 all out)
it takes everything out of an athlete and so the next 2 days are basically used as recovery days.
how do you work around that when you have 2 full season to compete in.
we did this in the Fall once, and also did the broken 400s maybe twice before the season started.
i know a couple programs do this (runs all out for time) but its not something they continue to do throughout the season.