How many reps for 400m sprinter?

I have been trying to find the study on several occasions but didnt find it a second time.
For starters, it was in adobe acrobat format, which might make it even harder to find on google search etc…

They were not complete beginners. I remember that they were WAy above novice leval, and higher than intermediate leval, but obviously they were not Olympic medalists who would not have had the time to partake in the study.

The squats were not the only training element. They were the only differance in the training between the two groups.

I’ll try one more time to find the study, no promises I’ll find it.

This interview I saw in Athletics weakly magazine in Uk, was around late 90’s or 2000.
Something doesnt tally up I guess.