What is the key to avoid injury when squatting with your body weight?
I've heard that when you are doing squats, your knees should not go past your toes. However, two hundred squats, is telling me that I should go down until my legs are parallel to the ground. I can't go parallel without my knees going past my toes. Should I stop my knees going past my toes, or should I go all the way down?