
Originally Posted by
Ryan Cook
I think it has more to do with putting the weight on your heels. If you allow your weight to be over your toes you put too much stress on the ligaments in your knees. This is the same reason why Afghans can squat on their heels well into the latter parts of life. They don't use chairs a lot of the time, they just squat.
I'm not even sure if that was racist or not :P... but you squat atg as a baby, some people lose the hip flexibility etc.. as they get older because they don't squat etc.. anymore. So if they go atg they will be like a foot over their toes when their shins should be practically perpendicular to the floor. Also some people shouldn't go that low because they have a long spine.. so going that low(some even can't make parallel.. freaky long spines) would cause them to lose their arch in their back. People swear by atg.. saying it saved their knees.. people swear by parallel for the same reason. Physics(of the load progression) and kinesiology can push either way.
Basically their is no right answer.. everyone will always argue about it.
Personal experience --> I go to parallel or just bellow in my squat workouts. But I sometimes do atg as an accessory right after or if my knees have been bothering me for a while a few weeks of them make my knees feel better.
ooh.. atg also doesn't mean go as low as physically possible.. you're going to want to stop before your hams press up on your calf or you're going to be pulling your knee apart
edit:This is basically a neutral post not pushing for one or the other.. Almost all the injuries people get are from terrible form because of a lack of flexibility or a lack of understanding of their personal body mechanics.