That makes sense for a boxer who has to fight over 3 min rounds, but does not make sense for a sprinter who is training for an event that lasts 12 seconds or less. Sprinters don’t need the type of fitness that a boxer requires.
It’s not possible for a predominantly white fiber athlete to hit the speedball at maximum velocity for a full 3 mins. The 6 x 3 min rounds with 1 min rest that has been suggested here is real endurance stuff i.e. more suitable, in my opinion, for someone who runs the 1500m event. I think bursts of 20 sec or so on the speedball at maximum speed with a full recovery would make a lot more sense for a short distance sprinter.