Originally Posted by coachvu
Agreed, but that's considered a full squat. For example, if you were lifting competitively, it would not count as a rep unless you went to at least parallel. There are plenty of machine that provide great leg workouts while also reducing the stress on your knees, so if knee problems are a concern, I would avoid bar squats completely.
Going all the way down (ATG) causes less stress than a parallel squat. ...