MR .T said:
Its' hard to say. WHen you squat, you keep your toes about even with knees, or are the knees behind or in front of toes. If they are back behind toes, your hamms will get the brunt. I use dumbbells, and have noticed that if my toes are more about even, it better hits my quads. Also, my lower back doesn't really hurt anymore. I do realize that if your knees go above your toes and you have heavy weight, you're asking for a knee blowout. The drive goes from your hips directly to your knee joint. Now, this may be key because pyschologically, if you are doing that, you may put half that emphasis on your back. I tweaked my knee a few weeks back from walking down a snowy hill with 3 dogs. Today, I did dumbbell squats barefoot, and kept even and had no pain. I know they sound sissy-ish, but man I was panting doing 45s. I kept thinking of arnold in pumping iron, telling ed corney who was squating tons, ....in his accented voice, and not what you'd say enthusiastic...on rep 6..."common, lets get serious". Well, it is really funny if you hear the way he says it.