> **Possible Duplicate:**  
> [What is the key to avoid injury when squatting with your body weight?](http://fitness.stackexchange.com/questions/2959/what-is-the-key-to-avoid-injury-when-squatting-with-your-body-weight)  

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I've heard that when you are doing squats, your knees should not go past your toes. However, [two hundred squats][1], 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?

  [1]: http://www.twohundredsquats.com/what.html