I need to start saying american football on here. Forget that it means two different things. I train a few soccer(football) kids, and they benefit greatly from general strength programs. I use a variation of 531 with all my athletes, just changing the rep protocols and exercises of the assistance and auxillary work. Depends on the sport. I am a big fan of simplicity. I can’t say if what I do is superior, but I will take the results. Most of the kids that do our program are highly injury resistant and superior in many facets physically to their contemporaries. I like the KISS principle. When it comes to injury, I think ESTI and myself like to nip things in the bud before they become full blown issues. Technology can be your friend. That being said, I don’t like gimmicky things, there has to be an effect I can see or feel myself before I ever use anything.