The ATG debate is a long-standing one. I've seen various articles and studies that list pros and cons of each, everything from hypertrophy to injury risk and strain on the knees. I read this article yesterday, actually, and it's a great piece. It reviews how to find the right squat depth for YOU and YOUR levers, and not anyone else's. There are so many variables that will determine what is proper depth for you. Now if you're talking about what counts for powerlifting meets, that will be determined by each PL federation. Some say you have to break parallel, some say just at parallel is good enough.
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